Book Publishers and Vendors

O'Reilly & Assoc

http://www.oreilly.com

Manning

http://www.manning.com

Wiley (computing)

http://www.wiley.com/cda/sec/0,,2925,00.html

New Riders

http://www.newriders.com/index.asp

Wrox Press

http://www.wrox.com

Addison Wesley (tech pro)

http://www.awprofessional.com/

MIT Press

http://mitpress.mit.edu

Powell's

http://www.powells.com/

Amazon book search

http://www.amazon.com/exec/obidos/ats-query-page/ref=b_tn_bh_bo/103-2007903-6193438

Bibliofind

http://www.bibliofind.com