If after browsing all of the categories of books for your class, if you still do not find one that interest you, you may choose your own book. There are two websites you can check:

PDF Drive

All Books World

All Books World also allows you to request digital copies of books. I have used this and they have posted about 75% of the books I have asked for. You may try this. It sometimes takes a few days for the book to post. If you have any questions on how to do this please let me know.

All Books World Book Request