Don't know about books, but I'd recommend these:
http://buildyourownclone.com/ - good kits that are easy to start with
http://buildyourownclone.com/board/ - forums for BYOC, some really helpful people
http://www.generalguitargadgets.com/ - these are the kits I started with. A little cheaper but not as good as BYOC
http://www.diystompboxes.com/wpress/ - Some interesting articles, but I don't go here all that much
http://www.diystompboxes.com/smfforum/ - Forums for DIYSB, again really helpful people and some pretty cool projects
http://www.freestompboxes.org/ - Lots of schematics and projects
http://www.beavisaudio.com/ - lot of articles explaining stuff
http://www.guitarpcb.com/ - Good supplier of PCB's once you're ready to source your own parts and do your own projects
Those are the main things I was using when I was building pedals a few years ago.