A wonderful stand-alone book from a skilled crime writer, this novel stars a K-9 dog names Maggie, discharged from the Marines after she was wounded and her handler killed in Afghanistan. Now, LAPD officer Scott James, recovering from the horrific night his partner was killed and he nearly died from his own wounds, has come as a trainee to the K-9 unit. Maggie, who has failed to pass the examination, is to be sent home. But Scott sees the PTSD Maggie suffers, and takes her on. Crais, whose many award-winning novels usually star private eye Elvis Cole and his enigmatic friend Joe Pike, has departed from his usual human-oriented tales and turned out a marvelous, compelling tale of love and trust and the terrible price some must pay for our freedoms. It's a 5+.