Sherlock Holmes And The Runestone Mystery ($23.95; Oct.; 336 pp.; 0-670-88821-4) It’s spring 1899: time of course for another adventure of Sherlock Holmes in Minnesota, where he and Watson—and barkeeper/inquiry agent Shadwell Rafferty (Sherlock Holmes and the Ice Palace Murders, 1998)—will try to authenticate the Holandberg rune stone: a task made considerably more difficult when Olaf Wahlgren, the farmer who dug it up, is murdered and the stone snatched away.