What to read after Downfall of the Crusader Kingdom?

Downfall of the Crusader Kingdom tells the story of the reason for Richard the Lionheart's infamous Third Crusade, culminating in the disastrous battle of Hattin in 1187. Hattin is one of the few battles in history that can truly be called decisive, and it was a catastrophe for the Crusaders. The leading men of the kingdom of Jerusalem, including the Knights Templar and the Hospitallers, were trapped in arid wasteland, without water and surrounded by hostile forces. The battle ended with thousands of them being taken prisoner. It was the culmination of a series of events that had been progressively leading the kingdom of Jerusalem down the road to oblivion. It was partly the resurgence of the Muslim Middle East and the rise of Saladin that led to the loss of Jerusalem, but there was another equally dangerous element at work – the enemy within. W.B. Bartlett tells the story of naked ambition and intrigue that led to bitter infighting and ultimately the downfall of the Christian crusaders.