Welcome, Francinee516!
Personally, my favorite is Bipolar Disorder for Dummies. It has cartoons. That's not why I like it best, but it doesn't hurt(!) I've read or at least pawed through many of the books out there, and just find this one to be straightforward and easy to understand (well, as easy to understand as BP can be anyway). It's the only one I bother to own.

There is actually a pinned thread at the top of the Bipolar forum especially about books. You may want to read through it and see what people have had to say on the subject.