Christie - They Do It with Mirrors (Miss Marple), PB

Agatha Christie, the acknowledged mistress of suspense—creator of indomitable sleuth Miss Marple, meticulous Belgian detective Hercule Poirot, and so many other unforgettable characters—brings her entire oeuvre of ingenious whodunits, locked room mysteries, and perplexing puzzles to Harper Paperbacks… including They Do It with Mirrors, where Miss Marple investigates some rather deadly doings at a rehabilitation center for delinquents.