Planet Mappers, The by Edward Everett Evans (1893 - 1958)

The Carver family are out in space, travelling to new worlds to check them out for colonization. But, when Mr. Carver has an accident, and remains out of commission for the trip, his sons, Jon and Jak, step up and take over their trip. The boys use their different talents to make their journey a successful one! (Ann Boulais)