If you could make a film of any book never produced as a film, what book would you pick?

David Morrell’s The Fraternity of the Stone. I believe a very loose (as in not at all like the book) adaptation was made at one point, but I would love to see the novel made into a movie as written. The story is of an ex-assassin who has given up the life and sought redemption for his soul in an extreme monastic order. Years pass by and the man’s enemies eventually track him down. A hit is ordered on the entire monastery in order to assure that he is killed, but by chance (or was it diving providence?) the man survives. He is motivated to find out who did this and avenge the death of his brethren, but it requires him to return to the life of violence he swore to leave.  Lots of great action, espionage and spiritual dilemma’s in this one.