On Mars, members of Earth’s South Colony prepare to migrate north before winter arrives. It is also the beginning of a new school year at the academy on Syrtis Minor, near the North Colony. Returning to the school are best friends Jim Marlowe, Frank Sutton, and Jim’s pet, Willis. The latter is a round, furry Martian creature with the uncanny ability to remember everything it hears and repeat it with perfect accuracy.

This talent comes in handy when Jim, Frank, and Willis arrive at the academy and find themselves subject to the draconian rules and regulations of the new headmaster who confiscates Willis and locks the Martian in his office. While there, Willis overhears a conversation between the headmaster and the colony’s leader, Harold Beecher. After he is liberated by Jim and Frank, Willis recites all that he heard, including a plot to prevent the colonists in the south from migrating, thereby assuring that many will not survive the winter. With the headmaster monitoring all communications to and from the academy, there is no way to send a warning.

Can Jim and Frank break out of the school with Willis and survive the journey back to the South Colony on their own?

Published in 1949, Red Planet is the third in Heinlein’s juvenile novel collection (what might be called young adult in today’s vernacular). It’s a delightful romp with an imaginative take on indigenous Martians and their world’s landscape. I couldn’t help but think of Percival Lowell upon reading about the canals that our heroes traversed during their journey home.