The book describes the in intriguing geology and geologic evolution of Lassen Volcanic National Park and surrounding areas, providing an up-to-date source of geologic information specific to Lassen Country. The book includes updated geology based on over 30 years of regional field work in Lassen Volcanic National Park and vicinity.

California's geology makes headlines when faults shift, volcanoes puff steam, and coastal bluffs fall into the sea. This book explores the state's recent rumblings and tremulous past with the aid of full color illustrations. Photographs showcase multihued rock, from red chert and green serpentinite to blue schist and gray granite. The geologic information, particularly for the Klamath Mountains, Modoc Plateau, and northern Sierra Nevada, has been updated to reflect new geologic understanding of these complex areas. Features detailed, easy to read color geologic road maps based on the 2010 Geologic Map of California.