Looking for good books on the Crusades

Hi. Currently, I’m trying to find some good books about the Crusades, specifically the middle and late 12th century (around the time of Baldwin IV). I’m looking for writings that could give some description of the general situation of the time, a good idea of the geography of the land at the time, and the equipment that might have been used at that time by Crusaders or Saracens. In short, I’m looking for books that would give me enough knowledge of the setting to be able to write a novel set in that period. Does anyone have any books to suggest?

Thanks,
Zarayna

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