He also edited several anthologies, including Four and Twenty Bloodhounds, published in 1950. As the title suggests, the work features 24 stories of fictional sleuths, ranging from senator whose hobby is magic to a former cop whose address is Skid Row in San Francisco, to icons like Ellery Queen and Dr. Gideon Fell. Boucher contributed a preface and brief editorial introductions to each story, and each detective is given his only "biography" in he book. As Kirkus noted, it's "A sure entertainment bet which will be of special interest to the mystery market."
The stories were chosen by Boucher and feature members of the Mystery Writers of America. In addition to Boucher, the authors include Verne Chute; Joseph Commings; W T Brannon; John Dickson Carr; Ken Crossen; Matthew Head; Lillian De La Torre; Harold Q Masur; Frank Kane; Jerome & Harold Prince; James M Fox; Clayton Rawson; D B Olsen; Robert Arthur; Lawrence G Blochman; Stewart Sterling; August Derleth; Ellery Queen; Brett Halliday; Fredric Brown; George Harmon Coxe; Q Patrick; Kelley Roos; and Stuart Palmer.