If you’re interested in Richard the Lionheart, you must definitely read this. It does contain some detailed descriptions about his campaigns, measures as a king and his personality. Also, tries to sees everything in ‘grey’, not black and white. It contains some political analysis about his era too.
What I dislike though, is that the writing is not always coherent. It starts an idea, for example his relationship with Berengaria, adds some thoughts and analysis, then it’s left off. In a new chapter it’s started again.