A lot of good books have already been mentioned and I own several of them. For me, the best book that I recommend to people is
The Companion Parrot Handbook by Sally Blanchard. It's filled with great stories, has lots of helpful information and presents a wonderful philosophy on life with companion parrots. To get an idea about her writing style, here is a link to a number of her articles:
Articles by Sally Blanchard
I hope this is of some interest or help to people.