A fairly strange novel by Robert Heinlein, better known for its radical arguments for polyamory than for any actual literary value. The story is actually two different stories which happen to be sequels, the first about how the "Man from Mars" arrives on Earth and is allowed to fit in to our culture, and the second when he starts developing and explaining his ideas about sex, God, and laughter. Robert Heinlein could have done better with this book if he hadn't been hitting us over the head with his social philosophies the whole time.

Incidentally, this novel is thoroughly offensive to Christians because of Heinlein's depiction of the novel's corrupt church and the blatant parallels between Christ and the title character. Those readers are recommended to read "Starship Troopers" or "The Moon is a Harsh Mistress" instead for an introduction to this author.