Young adults learn very differently now and they focus on question banks a lot more, but if you ask me you should look at the source of most of the questions. The Synopsis of Psychiatry by K&S (the full 2 volume set is asking too much) is almost half and most of the other half is the APA text of Psychiatry. You should probably supplement either one or both of these with a psychopharm book as one chapter on pharm isn't enough.
Good luck and happy studying.