http://www.amazon.com/Man-Who-Sold-Moon/dp/0671578634
(spoilers: http://en.wikipedia.org/wiki/The_Man_Who_Sold_the_Moon)
Then, for fun, go on to The Moon is a Harsh Mistress, wherein a great acronym TANSTAAFL is introduced.
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http://www.amazon.com/Man-Who-Sold-Moon/dp/0671578634
(spoilers: http://en.wikipedia.org/wiki/The_Man_Who_Sold_the_Moon)
Then, for fun, go on to The Moon is a Harsh Mistress, wherein a great acronym TANSTAAFL is introduced.