List of potentially useful and interesting books

The Cathedral and the Bazaar

The Jargon File

How To Become a Hacker

The Art of Unix Programming

Hardware Hacking
Electronic Gadgets for the Evil Genius : 28 Build-It Yourself Projects

Hardware Hacking Projects for Geeks

Books by LUG members

DHTML Utopia, by Aq

Linux Desktop Hacks, authors inc. Jono

The Official Ubuntu Book, authors inc. Jono