While Bay Area engineering geologist Craig S. Harwood is a descendant of the primary character in his new nonfiction history book, he doesn’t emphasize the family connection or offer cozy personal anecdotes. But he does provide plentiful facts in “Bridget’s Gambit: A Saga of Family Enterprise in Gold Rush California” (University of Oklahoma Press, 212 pages, $34.95 hardcover/$21.95 ePub, Feb. 10, 2026). […]