Ex crime reporter Qwill receives an SOS from his friend Lori Bamba into some odd goings on at The Nutcracker Inn which she and her husband are managing and as Qwill's lady is going on holiday he takes the cats to visit the Inn. The cats are intrigued by a locked door into the turret room and demand that it be opened, this is done and an old mystery is solved. Ko-Ko makes his presence felt by his yowling and so the trio move into one of the cabins by the creek of the title which runs through the Black Forest, the Forest is very old and mysterious and contains some valuable black walnut trees (amongst other things). Ko-Ko's sixty whiskers tell him that a log floating downstream is, in fact, a body and he draws Qwill's attention to it, he is also very interested in a pair of shoes found in their cabin and Qwill calls upon his fund of knowledge to discover their secret. Qwill meets his neighbours in the cabins and Ko-Ko helps to drive out an unpleasant one. One of the neighbours is a keen photographer and insists, against his wife's wishes, on exploring the Forest and subsequently goes missing. This leads to his wife's collapse and the intervention of the local law. Qwill learns more about the trees and the history of the Inn from the Klingenschoen foundation's attorney and other sources. After encountering a large truck in the Forest where no truck should be and another disappearance Ko-Ko leads Qwill to the solution of all the mysteries. Qwill has enjoyed the cuisine at the Inn but is glad to be re-united with Polly and to return to his barn. Being an ardent Siamese cat lover I fell in love with the first 'Cat Who' books and have followed them ever since, this, perhaps, is not the very best of the stories but nevertheless is a good read. I eagerly await the next.