I've not yet played the game, but this was so detailed that I had a very vivid image throughout & didn't want to put it down. I don't know how much of Henry's story is told in the game, so was surprised the book is mostly about him, not the Frye twins. I really enjoyed it, but the last fifth dedicated to the twins felt a little rushed at first, because it doesn't go into detail about each assassination, but I imagine all the key points are there.