Hell is other browsers - Sartre
I've written a book, 'ppk on JavaScript', New Riders, 2006.
The purpose of the book is to offer easy access to all the basic JavaScript knowledge I've gathered in the eight years I've been a professional Web developer.
More information.
QuirksMode.org is the personal and professional site of Peter-Paul Koch, freelance web developer in Amsterdam, the Netherlands.
It contains about 120 pages with CSS and JavaScript tips and tricks, and is one of the best sources on the WWW for studying and defeating browser incompatibilities. It is free of charge and ads, and largely free of copyrights.