History is evoked in the latest installment of The Sherlock Files: The Case that Time Forgot by Tracy Barrett. Xander and Xena, descendants of Sherlock Holmes, are Americans in Britain, ready to solve two more mysteries. A thief is operating in their school, filching small items from student lockers, and the upstart Americans are challenged to find the culprit. At the same time, their friend Karim relates a fantastic tale of a magical Egyptian amulet with the power to stop time that’s gone missing. The two cases become one when a vital clue is stolen from Xander’s school locker. The trail leads across London, from Cleopatra’s Needle to Big Ben’s tower, to an obscure museum, where the treasure hunt reaches a surprising conclusion. There’s plenty of local color to add to the adventure, as the two Americans deal with British customs with aplomb and a dash of danger.