Please note that data transmitted via the internet (e.g. via email communication) may be subject to security breaches. Complete protection of your data from third-party access is not possible.
SSL or TLS encryption
This site uses SSL or TLS encryption for security reasons and for the protection of the transmission of confidential content, such as the inquiries you send to us as the site operator. You can recognize an encrypted connection in your browser’s address line when it changes from “http://” to “https://” and the lock icon is displayed in your browser’s address bar.
If SSL or TLS encryption is activated, the data you transfer to us cannot be read by third parties.
External Web Sites
Please note that this site contains links to other web sites (e.g. to gumroad.com for the ebook selling process). Please be aware that we are not responsible for the privacy practices of these other sites. We encourage our users to be aware that when they leave our site that you read the privacy statements of each web site that might collect personally identifying information.
This privacy statement applies solely to information collected by this site.
Opposition to promotional emails
We hereby expressly prohibit the use of contact data published in the context of website legal notice requirements with regard to sending promotional and informational materials not expressly requested. The website operator reserves the right to take specific legal action if unsolicited advertising material, such as email spam, is received.
2. Data collection on our website
Most of the cookies we use are so-called “session cookies.” They are automatically deleted after your visit. Other cookies remain in your device’s memory until you delete them. These cookies make it possible to recognize your browser when you next visit the site.
Server log files
The website provider automatically collects and stores information that your browser automatically transmits to us in “server log files”. These are:
Browser type and browser version
Operating system used
Host name of the accessing computer
Time of the server request
These data will not be combined with data from other sources.
The basis for data processing is Art. 6 (1) (f) GDPR, which allows the processing of data to fulfill a contract or for measures preliminary to a contract.
Should you send us questions via the contact form, we will collect the data entered on the form, including the contact details you provide, to answer your question and any follow-up questions. We do not share this information without your permission.
We will, therefore, process any data you enter onto the contact form only with your consent per Art. 6 (1)(a) GDPR. You may revoke your consent at any time. An informal email making this request is sufficient. The data processed before we receive your request may still be legally processed.
We will retain the data you provide on the contact form until you request its deletion, revoke your consent for its storage, or the purpose for its storage no longer pertains (e.g. after fulfilling your request). Any mandatory statutory provisions, especially those regarding mandatory data retention periods, remain unaffected by this provision.
Leaving comments on this website
If you use the comment function on this site, the time at which you created the comment and your email address will be stored along with your comment, as well as your username, unless you are posting anonymously.
Storage of the IP address
Our comment function stores the IP addresses of those users who post comments. Since we do not check comments on our site before they go live, we need this information to be able to pursue action for illegal or slanderous content.
How long comments are stored
The comments and the associated data (e.g. IP address) are stored and remain on our website until the content commented upon has been completely deleted or the comments are required to be removed for legal reasons (slander, etc.).
The comments are stored based on your consent per Art. 6 (1) (a) GDPR. You may revoke your consent at any time with future effect. An informal email making this request is sufficient. The data processed before we receive your request may still be legally processed.
3. Social media
Facebook plugins (Like & Share buttons)
Our website includes plugins for the social network Facebook, Facebook Inc., 1 Hacker Way, Menlo Park, California 94025, USA. The Facebook plugins can be recognized by the Facebook logo or the Like button on our site. For an overview of Facebook plugins, see https://developers.facebook.com/docs/plugins/.
If you do not want Facebook to associate your visit to our site with your Facebook account, please log out of your Facebook account.
Our pages use Google+ functions. It is operated by Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, USA.
Collection and disclosure of information: Using the Google +1 button allows you to publish information worldwide. By means of the Google+ button, you and other users can receive custom content from Google and our partners. Google stores both the fact that you have +1’d a piece of content and information about the page you were viewing when you clicked +1. Your +1 can be displayed together with your profile name and photo in Google services, for example in search results or in your Google profile, or in other places on websites and advertisements on the Internet.
Google records information about your +1 activities to improve Google services for you and others. To use the Google + button, you need a globally visible, public Google profile that must contain at least the name chosen for the profile. This name is used by all Google services. In some cases, this name may also replace a different name that you have used to share content via your Google account. The identity of your Google profile can be shown to users who know your email address or other information that can identify you.
Use of collected data: In addition to the uses mentioned above, the information you provide is used in accordance with the applicable Google data protection policies. Google may publish summary statistics about users’ +1 activity or share it with users and partners, such as publishers, advertisers, or affiliate websites.
Our website contains functions of the Instagram service. These functions are offered by Instagram Inc., 1601 Willow Road, Menlo Park, CA 94025, USA.
If you are logged into your Instagram account, you can click the Instagram button to link the content of our pages with your Instagram profile. This means that Instagram can associate visits to our pages with your user account. As the provider of this website, we expressly point out that we receive no information on the content of the transmitted data or its use by Instagram.
Our website contains functions of the Pinterest social network, operated by Pinterest Inc., 635 High Street, Palo Alto, CA, 94301, USA.
When you visit a page containing the Pinterest social plugin, your browser establishes a direct connection to the Pinterest servers. The plugin transmits this log data to Pinterest servers in the United States. This log data may include your IP address, the address of the websites visited, which also includes Pinterest features, browser type and settings, the date and time of the request, how you use Pinterest, and cookies.
More information about the purpose, scope and further processing and use of data by Pinterest, as well as your rights and options to protect your privacy, can be found in the privacy notices of Pinterest: https://about.pinterest.com/de/privacy-policy.
Our website contains functions of the Reddit social network, operated by Reddit (Reddit Inc., 520 Third Street, Suite 305, San Francisco, CA 94107, USA) .
If you are logged into your Reddit account, you can click the Reddit button to link the content of our pages with your Reddit profile. This means that Reddit can associate visits to our pages with your user account. As the provider of this website, we expressly point out that we receive no information on the content of the transmitted data or its use by Reddit.
4. Analytics and advertising
This website uses Google Analytics, a web analytics service. It is operated by Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, USA.
Google Analytics uses so-called “cookies”. These are text files that are stored on your computer and that allow an analysis of the use of the website by you. The information generated by the cookie about your use of this website is usually transmitted to a Google server in the USA and stored there.
Google Analytics cookies are stored based on Art. 6 (1) (f) GDPR. The website operator has a legitimate interest in analyzing user behavior to optimize both its website and its advertising.
We have activated the IP anonymization feature on this website. Your IP address will be shortened by Google within the European Union or other parties to the Agreement on the European Economic Area prior to transmission to the United States. Only in exceptional cases is the full IP address sent to a Google server in the US and shortened there. Google will use this information on behalf of the operator of this website to evaluate your use of the website, to compile reports on website activity, and to provide other services regarding website activity and Internet usage for the website operator. The IP address transmitted by your browser as part of Google Analytics will not be merged with any other data held by Google.
You can prevent these cookies being stored by selecting the appropriate settings in your browser. However, we wish to point out that doing so may mean you will not be able to enjoy the full functionality of this website. You can also prevent the data generated by cookies about your use of the website (incl. your IP address) from being passed to Google, and the processing of these data by Google, by downloading and installing the browser plugin available at the following link: https://tools.google.com/dlpage/gaoptout?hl=en.
Objecting to the collection of data
You can prevent the collection of your data by Google Analytics by clicking on the following button. An opt-out cookie will be set to prevent your data from being collected on future visits to this site:
This website uses Google Analytics’ demographic features. This allows reports to be generated containing statements about the age, gender, and interests of site visitors. This data comes from interest-based advertising from Google and third-party visitor data. This collected data cannot be attributed to any specific individual person. You can disable this feature at any time by adjusting the ads settings in your Google account or you can forbid the collection of your data by Google Analytics as described in the section “Refusal of data collection”.
If you would like to receive our newsletter, we require a valid email address as well as information that allows us to verify that you are the owner of the specified email address and that you agree to receive this newsletter. No additional data is collected or is only collected on a voluntary basis. We only use this data to send the requested information and do not pass it on to third parties.
We will, therefore, process any data you enter onto the contact form only with your consent per Art. 6 (1) (a) GDPR. You can revoke consent to the storage of your data and email address as well as their use for sending the newsletter at any time, e.g. through the “unsubscribe” link in the newsletter. The data processed before we receive your request may still be legally processed.
The data provided when registering for the newsletter will be used to distribute the newsletter until you cancel your subscription when said data will be deleted. Data we have stored for other purposes (e.g. email addresses for the members area) remain unaffected.
This website uses the services of MailChimp to send newsletters. This service is provided by Rocket Science Group LLC, 675 Ponce De Leon Ave NE, Suite 5000, Atlanta, GA 30308, USA.
MailChimp is a service which organizes and analyzes the distribution of newsletters. If you provide data (e.g. your email address) to subscribe to our newsletter, it will be stored on MailChimp servers in the USA.
MailChimp is certified under the EU-US Privacy Shield. The Privacy Shield is an agreement between the European Union (EU) and the US to ensure compliance with European privacy standards in the United States.
We use MailChimp to analyze our newsletter campaigns. When you open an email sent by MailChimp, a file included in the email (called a web beacon) connects to MailChimp’s servers in the United States. This allows us to determine if a newsletter message has been opened and which links you click on. In addition, technical information is collected (e.g. time of retrieval, IP address, browser type, and operating system). This information cannot be assigned to a specific recipient. It is used exclusively for the statistical analysis of our newsletter campaigns. The results of these analyses can be used to better tailor future newsletters to your interests.
If you do not want your usage of the newsletter to be analyzed by MailChimp, you will have to unsubscribe from the newsletter. For this purpose, we provide a link in every newsletter we send. You can also unsubscribe from the newsletter directly on the website.
Data processing is based on Art. 6 (1) (a) GDPR. You may revoke your consent at any time by unsubscribing to the newsletter. The data processed before we receive your request may still be legally processed.
The data provided when registering for the newsletter will be used to distribute the newsletter until you cancel your subscription when said data will be deleted from our servers and those of MailChimp. Data we have stored for other purposes (e.g. email addresses for the members area) remains unaffected.
You can disable video embeds in your browser by clicking on the following button:
Google Web Fonts
For uniform representation of fonts, this page uses web fonts provided by Google. When you open a page, your browser loads the required web fonts into your browser cache to display texts and fonts correctly.
For this purpose your browser has to establish a direct connection to Google servers. Google thus becomes aware that our web page was accessed via your IP address. The use of Google Web fonts is done in the interest of a uniform and attractive presentation of our website. This constitutes a justified interest pursuant to Art. 6 (1) (f) GDPR.
If your browser does not support web fonts, a standard font is used by your computer.
You can disable the use of Google Web Fonts in your browser by clicking on the following button:
This site uses the Google Maps map service via an API. It is operated by Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, USA.
To use Google Maps, it is necessary to save your IP address. This information is generally transmitted to a Google server in the USA and stored there. The provider of this site has no influence on this data transfer.
The use of Google Maps is in the interest of making our website appealing and to facilitate the location of places specified by us on the website. This constitutes a justified interest pursuant to Art. 6 (1) (f) GDPR.
Click on the different category headings to find out more. You can also change some of your preferences. Note that blocking some types of cookies may impact your experience on our websites and the services we are able to offer.
Essential Website Cookies
These cookies are strictly necessary to provide you with services available through our website and to use some of its features.
Because these cookies are strictly necessary to deliver the website, you cannot refuse them without impacting how our site functions. You can block or delete them by changing your browser settings and force blocking all cookies on this website.
Google Analytics Cookies
These cookies collect information that is used either in aggregate form to help us understand how our website is being used or how effective our marketing campaigns are, or to help us customize our website and application for you in order to enhance your experience.
If you do not want that we track your visist to our site you can disable tracking in your browser here:
Other external services
We also use different external services like Google Webfonts, Google Maps and external Video providers. Since these providers may collect personal data like your IP address we allow you to block them here. Please be aware that this might heavily reduce the functionality and appearance of our site. Changes will take effect once you reload the page.
Google Webfont Settings:
Google Map Settings:
Vimeo and Youtube video embeds: