Wyatt Earp, Bat Masterson, Wild Bill Hickok: most people could recount at least a few details of such celebrated Old West figures whose fame rests mainly upon their exploits as lawmen. Though they are icons today, these men represent only a small fraction of the vast number who risked everything to bring law and order to the frontier. Many other "law dogs" of the untamed West engaged in exploits rivaling or surpassing those of their renowned contemporaries, yet their names are little, if at all, known today. They've been overlooked, forgotten, or - in the parlance of their day -...