[lug] GTK Books/Web Sites?

[David Morris]

I am going to be developing some GUI's for Linux/Solaris in the near
future using the GTK toolkit.  I have done some minimal development
using GTK in the past, but I would like a good book and/or web site to
use as a reference for those areas I have not touched on or am rusty
in.

Any suggestions?  I know there are lots of both books and web sites
out there on GTK development...the problem is (as always) finding
those that are the best and most useful.

--David