There're odd things afoot in Thornaby, again. Rips in the very fabric of time are leaving bewildered people hours out of sync with their lives, and Lawrence gets mugged by cavemen. Then there's the strange nightly rumblings beneath the town - some say it's the sound of a ghost train. More importantly, for Arthur at least, is the fact that he still hasn't got off with Gwen. Arthur and Lawrence embark on an adventure more perplexing than any of Sherlock Holmes and Dr Watson's - can their detective ancestry (or something) help them crack the case?
Published by Scholastic
Also available as an audio book.
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