Stranger in the Past. 2º ESO (Tapa blanda)

It's a normal morning for 14-year-old Thomas Clark, and he's on the bus to school. But suddenly the bus is in an accident and everything goes black. Thomas opens his eyes and find he's been mysteriously transported to another time and place! The year is 1940 and there's a war going on. He's in hospital, recovering from polio! Thomas looks and sounds different name. The poor boy doesn't undestand what's happening and can't remember anything about his real life. What's going on? How will strange situation end?.