Nine short stories for science fiction addicts take a lock at a special aspect of future life- detectives and detecting. Situations include a variety of interplanetary and intergalactic cops and robbering and both the criminals and their captors are terrans and non-terrans of wide psychological and physical variation. Authors include Kendall Crossen, James Blish, H. Beam Piper, L. Ron Hubbard and so forth and in the main their works are vigorus and readable projections of old and familiar plots into the world of the future. Editor Norton has already won a wide audience.