Go backward through space-time into prehistory? It seemed fantastic, but the machine -- invented by Bob's father in connection with his research on the interrelation of time and gravity -- actually existed. Bob and his friend Pete are anxious to be the first to visit the era of the dinosaurs. Overruled, they watch Pete's father, a famous paleontologist, step into the shimmering ring -- and disappear into the past. But when he does not return on schedule because the machine jams, Bob and Pete follow on a daring rescue mission...
A thrilling time-travel adventure as only master storyteller Lester del Rey could tell it!
Sciencefiction en fantasy
Dit audioboek beoordelen
Geef ons je mening.
Informatie over luisteren
Smartphones en tablets
Installeer de Google Play Boeken-app voor Android en iPad/iPhone. De app wordt automatisch gesynchroniseerd met je account en met de app kun je online of offline lezen, waar je ook bent.
Laptops en computers
Je kunt boeken die je op Google Play hebt aangeschaft, lezen via de webbrowser van je computer.