I have "Professional Javascript for Developers" by Zakas (the guy in the front of that picture) out from the library. It is kind of amazing that someone managed to write 800 pages about javascript, and I very much doubt that anyone has ever needed to read it all. Zakas is very clear and informative, but I think does a half-assed jobed organizing material, and so ends up with way too much of it. I guess these things are intended as exhaustive references.

I also have "Ajax on Rails" (Scott Raymond) out. That is a freaking great book by a very good writer. I'll probably read the whole thing.