What is the difference between the electronic purchase option "eBook" and "PDF"?

We only offer the "eBook" option for our more recent course manuals and course texts. When purchasing an "eBook", you/your course participants automatically receive three different formats in their eLibrary to choose from: ePDF, ePub, and mobipocket. Please see our FAQ Section "eBooks" for details on the different formats. The electronic versions of our other manuals are only offered in one format (PDF), which is why we called the purchase option "PDF".

The process itself is the same for the eBook and PDF option if you purchase at least two copies: You will receive authorization codes that you then individually assign to each course participant.