All of the suggestions people posted are really helpful - I will have to check some of them out.

My psychiatrist recommended "Why am I still depressed? Recognizing and managing the ups and down of bipolar II and soft bipolar disorder" by Jim Phelps. It has been really helpful in me realizing that my diagnosis is real and learning what I need to manage it and help myself.

The other people I've been reading is "Less than crazy. Living fully with bipolar II" The woman who wrote it is a journalist and was diagnosed. So far its been helpful. I'm going to start looking at the books that are more nonfiction and personal stories now!