Our e-books are electronic versions of our printed books. We offer the e-books in up to four different file formats. Regardless on which device or where you want to read your e-book, you’ll have the most suitable format always at hand.

Every E-Book in Two to Four Formats

You can access every e-book 24/7 for online reading or as a downloadable PDF. The vast majority of our e-books are also available in EPUB (for iBooks and most e-book readers) and MOBI formats (for Kindle). Our e-books contain a personalized watermark, but are not protected with DRM technology. They are equipped with links for convenient navigation within the e-book and to external websites, if applicable. Most of our e-books are fully colored. For more details about a specific e-book, please consult the respective book’s catalog page on our website, under the “About the E-Book” section.

Terms of Use

When you buy an e-book, it will be available for online reading or for download for at least 12 months following the date of purchase. During this time, you can download every available format up to 5 times. You can print your e-book, create bookmarks or comments, and copy it to an additional device—but only for personal use.

Please note that e-books can't be returned once the purchase is complete. Please refer to our Terms of Use for our full return policy.

How to Buy, Activate, Load, and Read an E-Book

You buy an e-book in exactly the same way as a printed book: Select the e-book edition for a title, add it to your shopping cart, register, and submit the order. Immediately after payment has been completed, you will receive an e-mail with an activation link to your personal library. (If you preorder a book, you will receive the activation link on the day the title becomes available.) In your library, you will find your e-book ready for download. With your account credentials for, you’ll have 24/7 access to your library from any computer or mobile device.

You’ll find comprehensive information and instructions about e-books in our help section: Help E-Books. Also, our customer service is happy to answer your questions!

e-books are in PDF, EPUB, MOBI and for online reading On your PC, Smartphone, Tablet and E-Reader