No person excited greater emotion in Kansas than James Henry Lane, the U.S. senator who led a volunteer brigade in 1861-1862. In fighting numerous skirmishes, liberating hundreds of slaves, burning portions of four towns, and murdering half a dozen men, Lane and his brigade garnered national attention as the saviors of Kansas and the terror of Missouri. This first book-length study of the "jayhawkers," as the men of Lane's brigade were known,...