In Jo Situ Allen's second fine art coloring book, she shifts her focus to the California Floristic Province, a biodiversity hotspot that includes the coastal sand dunes and marshes of the San Francisco Bay Area, the Sierra Nevada mountains around Lake Tahoe, and the old growth redwood forests of Humboldt County. The Accidental Naturalist: Exploring the Flora and Fauna of San Francisco and Beyond includes a glossary that indicates which species are native or endemic to the region, and which are endangered.