> Does anyone know if there is a book out about the studies
 > on Alex the African Grey?  If there is, what's the title/
 > author?  Also, are there any other books on studies done
 > about humans communicating with animals, like the dolphins?
No actual books on Alex, but he's been written up in a ton of magazines and 
books, including Readers Digest and Bird Talk. One of the bird clubs in Utah 
recently released a video tape about Alex, showing him "at work" in the 
laboratory with Dr. Pepperberg and some of the students at the university in 
Arizona. It's an excellent tape!
Insofar as other books are concerned, yes, there are a ton of 'em! For a 
fact, I know there's quite a few about the monkeys that effectively use sign 
language. I think KoKo was the first to develop a sign language vocabulary in 
the hundreds of words. 
Then there's the elephant who paints (her work has been in galleries).
You might also look for the book When Elephants Weep. It doesn't specifically 
talk about human:animal communication, but it's a fascinating study of how 
animals interact with each other and how it might be compared to human 
emotions.
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