Most of you probably are familiar with Edward Packard, even if the name is just a tingle of memory at the moment. He wrote the initial Choose Your Own Adventure books which have now become an essential part of the gaming genome.
One of his books, and one I remember fairly well, was Inside UFO 54-40. The gamebooks.org site notes an interesting aspect:
Nice, a gamebook that insisted you cheat. Is there a valid digital analogy here?