Xerces Society
The Monarch Butterfly: Biology and Conservation
A collection of scientific studies and essays covering breeding, migration and overwintering biology.
Milkweeds, Monarchs and More, 2nd Ed.
Mariposa Road: The First Big Butterfly Year
A tale about finding as many butterfly species as feasible in one year.
Four Wings and a Prayer: Caught in the Mystery of the Monarch Butterfly
Chasing Monarchs: Migrating with the Butterflies of Passage
The Natural History of Butterflies
This book goes into incredible detail about life cycle, adaptations and plant associations. The butterflies described are mostly European species, but much of the fascinating detail also applies to the life histories of local species.
Field Guide to Butterflies of the San Francisco Bay and Sacramento Valley Regions
Truly specific to our region with lots of details on local species. The book also has good introductory information on butterflies, life histories, how to raise caterpillars, and local plants.