The Library stocks around 54.000 books (picture 1). These are displayed according to the subject group index. When you have found what you are looking for in the online catalogue, take a note of the location mark (picture 2), which is made up of letters and numbers (e.g. G 7 b). With this you can find the books you need on the shelves.
In addition you can access around 5.000 E-books, which are also listed in the online catalogue. To search just within these, use the link "Filter by media type" in the menu on the right and choose "e-books". You can then access the e-book by clicking on the link "Online available".