Fourteen quickies from the back files of the author of the original ""Psycho"" story, trick end-plays to make you gasp or yawn, depending. Poe and Saki and such did most of them first and better, but well-made they are, no-nonsense-paced, with pinches of macho and misogyny. Best by far: ""The Real Bad Friend,"" a trial run for the schizo-criminal of ""Psycho."" For the shredder: a Moonstone rip-off and some dated blather about method actors who get carried away with murderous roles. All crime-buffs should glance at the disarmingly themey introduction, but only devotees of mystery mags and Hitchcock's TV/paperback anthologies will want to chip away at the old (1956-1967 original publishings) Bloch.