One great book is Alex and me, I learned a lot about bird intelligence in general from reading that. It's not too long either, I read it in one sitting. A fun thing I used to do, and still do sometimes, is go to a library and grab all the interest parrot books I can find. Then I sit and read them all. Be aware that a lot of books have out of date information, for example, one book says to pull out a tail feather if a bird bites.
If you have the money, check out the total transformation course from bird tricks.
It's a incredible series of DVDs/book series about how to raise a bird right, and transform the worst behaved birds into being well behaved. It comes with 18 DVDs and 15 books to accompany the DVDs. It's the most advanced parrot training series on the market today. It's $297, a little steep but for all the knowledge brought together it's pretty great.