Tribal police chief Jack Bear Den will do anything to stop ecoterrorists. But partnering with disgraced ex-FBI explosives expert Sophia Rivas is trouble even his trail-tested skills never anticipated. Her out-there deductions are blowing up false leads, exposing treacherous lies--and sparking an attraction too dangerous for even Jack to resist. By the book was never Sophia's style. To save lives, she has to gamble on her instincts more than ever. If Jack doesn't trust her, she can handle it--but letting him uncover her deepest secrets is a distraction neither can afford. And with the clock ticking down and disaster about to strike, getting too close may be the last move she and Jack ever make.