A science fiction novel for young readers by American writer Robert A. Heinlein, originally serialized in The Magazine of Fantasy & Science Fiction (August, September, October 1958) and published by Scribner's in hardcover in 1958. It is the last of the Heinlein juveniles.
Plot summary:
Clifford "Kip" Russell, enters an advertising jingle writing contest, hoping to win an all-expenses-paid trip to the Moon. He instead gets a used space suit. Kip puts the suit (which he dubs "Oscar") back into working condition.
Kip reluctantly decides to return his space suit for a cash prize to help pay for college, but puts it on for one last walk. As he idly broadcasts on his shortwave radio, someone identifying herself as "Peewee" answers and requests a homing signal. He is shocked when a flying saucer lands practically on top of him. A young girl (Peewee) and an alien being (the "Mother Thing") flee from it, but all three are quickly captured and taken to the Moon.
Robert Anson Heinlein was an American science fiction writer. Often called "the dean of science fiction writers", he was one of the most popular, influential, and controversial authors of the genre. He set a high standard for science and engineering plausibility and helped to raise the genre's standards of literary quality. He was one of the first writers to break into mainstream, general magazines such as The Saturday Evening Post, in the late 1940s, with unvarnished science fiction. He was among the first authors of bestselling, novel-length science fiction in the modern, mass-market era. For many years, Heinlein, Isaac Asimov, and Arthur C. Clarke were known as the "Big Three" of science fiction. ([Source](http://en.wikipedia.org/wiki/Robert_A._Heinlein).)
