Working under the influence of Sherlock Holmes, Basil adopts many of the detective's habits and styles to a mouse's world. Not the abominable Snowman, but the Adorable Snowmouse is a source of wonder in Switzerland when he arrives. Basil and roommate Dr. Dawson tramp the mountains on their entertaining search. The detailed, comical pictures of Paul Caldono complement the text of a happy mystery. Preceded by Basil of Boxter Street.