Book excerpt: Four kids--Max, Allie, Grady, and Toby--accidentally take a journey back in time in a beat-up Volkswagen beetle, where they encounter dinosaurs, discover star-faring angelic beings, and confront the tempter of Eden at the dawn of the world. Unexpected plot twists and ingenious escapes keep the pages turning to a satisfying ending-and leave the reader clamoring for a sequel.