Notes
Four Frontiers, an omnibus of Heinlein juvenile novels.

• Rocket Ship Galileo (1947)
• Space Cadet (1948)
• Red Planet (1949)
• Farmer in the Sky (1950)

Three young men do what we all wanted to – they build Rocket Ship Galileo and fly it to the moon. Of course it’s not so simple: there are rivals and red tape to overcome, and a totally unexpected – and possibly lethal – surprise waiting for them when they get there.

Matt Dodson has heroic dreams of joining the Space Patrol, so he becomes a Space Cadet and embarks on the long and difficult training that will show if he can do the job. His mettle is tested to the utmost when, on his first training flight, he finds himself in the midst of an interplanetary crisis.

Jim Marlowe grew up on the Red Planet, and when he’s sent off to boarding school at Syrtis Major, he insists on taking his Martian pet with him. He doesn’t anticipate how much trouble friendly little Willis will get him into – and how paradoxically lucky that will turn out to be.

Bill Lermer can’t wait to leave an overcrowded Earth and become a Farmer in the Sky on Ganymede. He thinks he’s ready for hard work and hardship – but he has no idea what it will mean when things go wrong and the nearest help is four hundred million miles away!

ABOUT THE AUTHOR
Robert Anson Heinlein was born in Butler, Missouri, in 1907. A graduate of the U.S. Naval Academy, he was retired, disabled, in 1934. He studied mathematics and physics at the graduate school of the University of California and owned a silver mine before beginning to write science fiction in 1939. In 1947 his first book of fiction, ROCKET SHIP GALILEO, was published. His novels include DOUBLE STAR (1956), STARSHIP TROOPERS (1959), STRANGER IN A STRANGE LAND (1961) and THE MOON IS A HARSH MISTRESS (1966), all winners of the Hugo Award. Heinlein was guest commentator for the Apollo 11 first lunar landing. In 1975 he received the Grand Master Nebula Award for lifetime achievement. Mr. Heinlein died in 1988.