Castle Crags Guidebooks
Northern California BoulderingChris Summit (2009) Supertopo
1st Edition, May 2009, covers 1600 problems, VB to V13, in 50 bouldering destinations.
Classic Rock Climbs No. 18 Castle Crags CaliforniaLaird Davis, 1997. Falcon Guides
A small sampling of routes in the park (there are a lot!). Very useful to have, but a little route-finding is definately necessary!