“Warning: Time travel can kill you!” A troubled adolescent boy buries a message in a cemetery for 5,000 years asking future time travelers to visit him. He

Eighth-grader Max, his older brother Kyle, and new friend Petra travel in time to the Cretaceous period to rescue Kyle's twin, Emma, who was kidnapped from thei

The reader's choices determine whether two classmates will survive after being mysteriously transported back in time to when exotic plants towered overhead and