When you buy the English or German version of "The Secret of Running", you get a link to download a .ePub file. .ePub is a special format for e-books.

You can read your e-book on any device but you may need to get a special reader for your device. For example, there is an extension for the Chrome browser to read your book on your computer. You can use your search engine to find a free reader for any device.

.ePub files cannot be automatically read on a Kindle device but there are workarounds (Stryd does not guarantee this works).