Trouble in Texas a John Whyte novel of the American West

John Whyte, Alan Pinkerton's newest detective, is eager to answer a call for help from his friend and former commander General Phil Sheridan. Some unreconstructed rebels are intimidating Union tax collectors and driving them out of Texas. And murderous outlaws are robbing nearly every Union Army payroll shipment. Are the two somehow connected? If so, why? John Whyte is going to find out, and if trouble comes his way, then the lead will start...