New York, Scribners, 1954. First Edition. First Impression. Hardback. A very good copy. A respectable copy. One of Heinlein's juvenile novels. Notable for the presence of non-white lead characters at a time where it was rare to see anything but white characters, particularly as protagonist. One large, 25mm closed tear to the top of the jacket. Some wear to the spine tips and fore corners. Some rolling to the edges. Cover art by Clifford Geary [6603, Hyraxia Books].