Creature discomforts : a dog lover's mystery / Susan Conant.

Enhanced descriptions from Syndetics:

A hike in the woods has memorable consequences for dog writer Holly Winter in this latest of Susan Conant's Dog Lover's Mysteries. When Holly Winter awakens, battered and bruised, clinging to a boulder on the side of a cliff, she doesn't even recognize her own beloved malamutes, Rowdy and Kimi, much less remember their names--or her own. She does, however, realize they're her dogs, and that she is--to put it mildly--a "dog person." And she vaguely remembers hearing a sinister voice from above. Putting clues together, she discovers that she is in Acadia National Park, on Mount Desert Island, Maine, and that she's the guest of one Gabrielle Beamon, a most attractive and charming woman, whom Holly doesn't recognize at all. When it is discovered that there was another fall, this one fatal, at approximately the same time and close to the same place as Holly's, she begins to fear for her own safety. In fact, she has all she can do to figure out what's going on without giving away her own loss of memory. You'll be licking your chops with glee as the dog fanciers in Conant's eclectic and eccentric group of characters once more prove themselves smarter and more resourceful in every way than their more anthropocentric counterparts.