Asbridge's biography of Marshall is excellent - it was reading that earlier this year that persuaded me to finally give The Crusades a go.

And yes, the lack of dramatic portrayal of the crusades is interesting to note. Perhaps the depiction of a Them and Us narrative is too problematic these days, even if the actual truth is more nuanced. I think that instead of a movie, a multi season depiction of Outremer would be fascinating.