A relatively short factual history of the knights. just the facts.
A fairly Average read. Follows a young Englishman in the train of the King of France with a focus on Eleanor. The reason for his crusade is a particularly foul bit of betrayal. It can get bogged down in descriptive language at times. Worth your time if you are interested in the time period.
A fairly decent old novel about a pair of boys, one grows up to be a knight the other a Franciscan, set in Sussex around 1254. A relatively fast read with some historical errors (Like Ivanhoe, it makes much of the distinction between Norman and English, something that really didnt exist anymore during the time of the story). But entertaining enough to be worth a read.
A decent read of a fairly fantastic character. Olaf had a life that is relatively hard to fathom, at various points a slave, viking and king.
The novel is one-sided, showing Harold\\\'s good side, explaining away the zealous excesses after his conversion to Christianity (such as forcing non-christians to swallow poisonous snakes for not converting.