DESIRE IS A FORCE TO BE RECKONED WITH When it comes to training K-9 patrol dogs, Yardley Summers always trusts her instincts. But when it comes to dating men, she keeps her heart on a very short leash. Mostly, she's too busy with her four-legged trainees at Harmonie Kennels to commit to a relationship. Only two men have managed to distract her: a handsome Doctors Without Borders physician who's suddenly gone missing-and the red-hot dog trainer from her past who's suddenly back in her life… Now a K-9 rescue team leader, Kye McGarren has never forgotten the days he trained at Yardley's camp-or the nights he spent in her arms. When he hears that Yardley is on a mission to find the missing doctor, Kye is determined to keep her out of danger. With his K-9 partner by his side, he joins Yardley on a death-defying mission-one that reignites their mutual passion. Will Kye be able to rescue his romantic rival…without losing the woman he loves? Rival Forces is the fourth installment of D. D. Ayres' K-9 Rescue series.