I spent last Thursday afternoon in a Brooklyn theater watching director and co-writer Martin Scorsese’s adaptation of David Grann’s Killers of the Flower Moon, and I feel comfortable saying that I’m an admirer of film and book alike. But it’s worth pointing out that Grann’s book — terrific as it is — is not the only literary work to deal with the horrific murders that were aptly known at the time as the Reign of Terror.