E-books are available in the formats ePub, PDF and mobi and are labelled with a corresponding symbol.
Short description of the formats:
The format ePUB is the standard format for e-books. E-books in the ePUP format reproduce dynamic content and are optimised for the use of mobile e-Readers. The text flow adapts itself automatically to the screen size of the device. The same applies for the mobi format, which is also an ePUB format, but specially developed for Kindle devices or Amazon customers.
PDF files are a platform-independent format for the exchange of text and pictures. PDF formats are especially common for reference books. PDF files can also be displayed without any problems on normally available e-Readers.