FREE: Twisted by Jonathan Kellerman

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Hollywood homicide detective Petra Connor has helped psychologist Alex Delaware crack tough cases in the past. She took the lead in the desperate hunt for a teenage runaway stalked by a vengeful murderer. Now the complex and wryly compassionate

Of the four seemingly random victims, one stands out: a girl with pink shoes who cannot be identified;and who, days later, remains a Jane Doe.

With zero leads and no apparent motive, until Petra decides to follow her instincts and descends into a world of traveling grifters and bloodthirsty killers, pursuing a possible eyewitness whose life is in mortal danger.

Finding her elusive quarry alive isn't all Petra has on her plate: departmental politics threatens to sabotage her case. Isaac Gomez, a whiz-kid grad student researching homicide statistics at the station house, is convinced he's stumbled upon a bizarre connection between several unsolved murders. The victims had nothing in common, yet each died by the same method, on the same date, a date that is rapidly approaching again. And that leaves Petra with little time to unravel the twisted logic of a cunning predator who's evaded detection for years and whose terrible hour is once more at hand.

The nonstop action leaves you breathless; the plot twists keep you guessing.