Michelle Wilson likes her life. An organizer, everything goes according to her plans. Until . . . The first menacing letter is a shock. The first weird phone call gives her the creeps. But when Michelle comes home to an unlatched door, she calls in the police. Detective Tom Lucisi's job description doesn't include threatening letters but one look at Michelle and he opens an investigation. Living on the edge describes Clint Sharkey. He sends the first letter without a care. The phone call is a lark. But he has no idea where his "project" will lead. Three people enmeshed in the puzzle. But is there an unknown joker in the deck?