"Bigfoot: A Bones Adventure" by Mark Wheaton is a tale in which an apparently abandoned police dog named "Bones" comes to the aid of a young girl out camping with some friends when suddenly screams are heard from adjacent campsites, trees are knocked over onto the campfires, and large, unidentifiable "creatures" are swarming from the woods, killing and consuming all the campers.
Young Jess manages to get into the car in which her party arrived, while one by one the others in her party are dismembered, decapitated, and otherwise removed from the picture. Finally getting the car started, Jess slams into several of the large creatures while making her escape, but doesn't get far before slamming into a tree the creatures had placed across her escape route.
Thrown from the car and knocked unconscious, Jess is awakened in the morning by Bones licking her face. The car and the tree which it had hit were both gone, and the scene was cleaned up to hide any evidence that anyone had ever been there. Jess and Bones head off together through the woods.
Eventually circumstances change, Bones is killed, and Jess is captured by the Bigfoot creatures, for that is what they are. The story takes many an odd twist and turn thereafter, and one can't help but wonder just what Bones really is... a dog or a ghost? This was not a bad story at all. I enjoyed it, and I also happen to know there are several other "Bones" books out there. I am compelled to read more of them to see if I can figure out what that dog really is. He could sure whup some Bigfoot tail!