The holidays are dangerous times for these K-9 heroes. Enjoy four heart pounding K-9 unit novellas in one box set! When a single dad returns from a war zone and discovers someone is following him, he turns to a K-9 officer for help. After a cryptic note appears in the playground at a daycare center, a rookie K-9 officer vows to protect the proprietor and the kids she loves. An FBI K-9 agent thwarts an attempted murder, and she becomes a target of the killer — the same hit man a US Marshal is tracking. Determined to stop an arsonist with the help of his accelerant-detecting K-9 partner, an FBI agent must protect the only witness. This box set includes: Rookie K-9 Unit Christmas Surviving Christmas by Valerie Hansen and Holiday High Alert by Lenora Worth Classified K-9 Unit Christmas A Killer Christmas by Lenora Worth and Yuletide Stalking by Terri Reed