TimeRiders

When Maddy mistakenly opens a time window where and when she shouldn't have, Liam is marooned sixty-five million years in the past in the hunting ground of a deadly--and until now--undiscovered species of predator. Can Liam make contact with Maddy and Sal without endangering history or being devoured by dinosaurs?.

In 1994 British computer hacker Adam Lewis finds his name in a coded manuscript that is almost one thousand years old. How could this happen? When the TimeRiders travel back to Sherwood Forest in 1194 to discover the origins of the ancient message they find a strange hooded man who is interested in the same thing. Now they begin to wonder what this cryptic link from the past holds for the future.