GNOME Programming Manual
Havoc Pennington (the guy
who does those weekly GNOME summaries, among other things) writes "I've just completed a book on GTK+/GNOME programming to be released under a free license.
You can pre-order from Amazon now; it should
be available in a couple months. The
full announcement is on www.gnome.org. "
Sadly, it looks like the author has moved away from the usual GNU style by not using Texinfo. I've always loved being able to produce PostScript, HTML, and GNU info files from the same input. It's nice to be able to view them from within Emacs.
But, at least the book is going to be truly free, so if I or someone else feels so inclined, we could make a Texinfo version ourself.