Book excerpt: You're no idiot, of course. You know the Crusades were a war between Christian and Muslims for control of the Holy Land. However, these bloody conflicts raged over centuries, under changing circumstances, making the whole story difficult to follow. You don't have to don armour and cross deserts to relive the Crusades! 'The Complete Idiot's Guide to the Crusades' shows you why these wars began, why they continued for so long, and how their impact on the world still resonates. This 'Complete Idiot's Guide' gives you: -An introduction to the Dark Ages and the Renaissance, and why Pope Urban II would grant absolution to anyone who reclaimed the Holy Land for Christianity.-The origins of such Holy Orders as the Knights Templar, the Hospitallers, and the Teutonic Knights and the roles they played during the Crusades.