(From the publisher):
Thinking he is going to a tournament of knights in the Middle Ages, fifteen-year-old Rudolf volunteers to test the time machine—but computer error strands him in the Rhineland at the exact time the Children's Crusade is passing through. Alone and disoriented Rudolf joins the immense children's army. The dreadful conditions he encounters compel him to use his twentieth-century knowledge to try to create order out of chaos, and in spite of himself he becomes a leader and organizer, though he knows the great undertaking is doomed to failure.
Original title: Kruistocht in spijkerbroek
Genre: Fiction→ Children & Young Adult→ Historical Fiction→ Europe→ Middle Ages
Fiction→ Children & Young Adult→ Fantasy→ Time Travel