Publisher's Synopsis
Strange things are happening behind Jed and Lizzie's house. The ghostly figure of a boy appears out of thin air and vanishes again. Who is he? What does he want? Desperately searching for answers, they make a shocking discovery. One that uncovers a devastating chain of events that began 121 years earlier - with a secret machine of extraordinary powers and a boy trapped in time. Now, as the past and present threaten to collide, Jed and Lizzie are thrown into a deadly struggle that could change the world for ever . . .
