Model Airplane News publishes a widely available book on scale detailing that includes an article on how to do rib stitching:

http://www2.towerhobbies.com/cgi-bin...?&I=LXRZ82&P=N


But you'll learn more from following the build-alongs by the master builders on the following site than you would from any book!

http://www.rcscalebuilder.com/forum/default.asp