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Robert A. Heinlein: Red Planet (Hardcover, 2001, Robert Hale Ltd)

Jim Marlow and his strange-looking Martian friend Willis were allowed to travel only so far. …

Review of 'Red Planet' on 'Goodreads'

One of the less interesting Heinlein juveniles. The only real interest is an introduction of Heinlein's Martians which become much more important in his Stranger in a Strange Land. It's worth a read for the completist, but not anyone else.