Don Brundige and Sharron Brundige have come out with a number of cycling books covering LA and Orange counties. I have the L.A. version and it has detailed maps of countless rides. The Orange County version can be found used for $6.00:

http://www.amazon.com/Bicycle-Rides-.../dp/0961915102

And some other books:

http://www.amazon.ca/exec/obidos/sea...Don%20Brundige