a good star book ??

Hi all.

I'm interested in purchasing a good book that will help me to find and
identify all of the constellations and was wondering if any of you star
gazers had any good advice. I'm looking for a book that has illustrations
and a good description of how to locate each constellation, and maybe a
little background about them. I'm willing to spend up to $100, so let your
ideas fly!.

Thanks

Karl