The Barker Street Regulars ($21.95; Mar. 1; 272 pp.; 0-385-48668-5): That's right: Conant's trademark Malamutes (Stud Rites, 1996, etc.) meet Sherlock Holmes, or the next thing to him, when Rowdy works as a therapy dog for a family so taken with the great man's adventures that they've managed to spawn both a murder and an animal-psychic fraud.