Doubleday inaugurates their ``Perfect Crime'' imprint with a body in a lake, soon identified as former soap-opera actress Gerry Snoo. Chief Superintendent Peter Diamond, charged with but recently absolved of malicious interrogation techniques, focuses on the victim's husband, university professor Greg Jackman, a local hero for saving young Matt Didrikson from drowning in the weir. Did Greg kill his wife in order to dally with Matt's mum, Dana? Did Dana do it for love of Greg? Or? At odds with his supervisor over procedures, Diamond resigns from the force but then investigates on his own. Finally, when Dana is charged, he offers telling tidbits to establish her innocence--and cause the courtroom breakdown of her employer, a drug importer with ties to cocaine addict Snoo. Crafty authorial misdirection--including a subplot about the authenticity and robbery of a pair of Jane Austen letters--as well as writing skills that have justifiably earned Lovesey international awards, plus a PBS following for his Sergeant Cribb series. Top-form Lovesey.