Local Government Records: An Introduction to Their Management, Preservation, and Use. by H.G. Jones. An oldie but a goody, read at school but still surprisingly relevant even in the digital age.
Preservation Magazine. Put out by the National Trust for Historic Preservation and free if you are a member. Here's how to subscribe.
LOCAL PRESERVATION BLOGS:
National Trust for Historic Preservation
Sacramento Museum Archives and Collection Center
Sacramento Library - Sacramento Room
CA Office of Historic Preservation
KVIE's Viewfinder Series
Victorian Preservation Association of Santa Clara Valley