EXCLUSIVE: Fox 2000 has acquired screen rights to The Floor Of Heaven, a non-fiction book by Howard Blum that will be published April 26 by Crown/Random House. Book is the fact-based story of Charlie Siringo, a cowboy who, after the taming of the Old West, became a Pinkerton detective. He’s drawn into a case takes him to the Yukon Gold Rush of 1897. George Carmack, whose early discovery of gold fueled the rush for riches, has been robbed of a fortune in heavy gold bars and Siringo tries to solve the crime. The film’s being done as a co-production between Chernin Entertainment and Fox 2000, with Chernin exec Dylan Clark running point with Fox 2000’s Carla Hacken. Deal was low against high six-figures. Blum last book, American Lightning, is being developed by Wind Dancer Productions. CAA made the deal.