As far as the present author knows, the notion of tanstaafl was introduced by Robert Anson Heinlein, who was and is the Grandmaster of Science Fiction. The expression appears in his novel The Moon is a Harsh Mistress. It is an acronym for "there ain't no such thing as a free lunch." Like Langham's Price Theory, Moon... consists mostly of preachy partisanship. Nevertheless, Heinlein succeeds beautifully in writing prose of "page turner" readability, as evidenced perhaps by his receipt of various Hugo and Nebula awards.