Xena and Xander have been looking forward to their vacation in the peaceful country village of Blackslope. But when a huge monster begins to terrorize the town, the young detectives are faced with a mystery that seems impossible to solve.
Sherlock Holmes, Xena and Xander's famous ancestor, investigated the case of a horrible beast in Blackslope, but that was nearly a hundred years ago. It couldn't be the same creature after all this time--could it?

Xander's classmate Karim tells him about a famous amulet carved in the shape of Thoth, the Egyptian god of time. It was thought to be so powerful that it could turn back time one day every hundred years. And that day is in a week

The amulet disappeared from a London museum years ago. Xena and Xander's celebrated ancestor Sherlock Holmes tried to find it, but had no luck. The twins are on the case--and so are mysterious foes who are trying to thwart and perhaps even harm them Can Xander and Xena track down what Sherlock Holmes could not?
The Case That Time Forgot is a...