Between the frequently recounted events of the Gold Rush and the Great Depression stretches a period of California history that is equally crucial but less often acknowledged. In his fresh, synthetic consideration of these in-between years, George L. Henderson points specifically to the take-off of California's rural juggernaut between the 1880s and middle 1920s--the upward spiral of city bids for country dollars and rural bids for urban investments. These decades were salve for mining's risky finances yet groundwork for the chaotic 1930s. Moreover, Henderson argues that much like the two...