The Door into Summer is a science fiction novel by American writer Robert A. Heinlein, originally serialized in The Magazine of Fantasy & Science Fiction (October, November, December 1956, with covers and interior illustrations by Frank Kelly Freas). It was published in hardcover in 1957.
The novel is fast-paced hard science fiction, with a key fantastic element and a romantic element.
In three separate Locus magazine readers' polls from 1975 to 1998, it was judged the 36th, 29th, and the 43rd all-time best science-fiction novel.Its title was triggered by a remark which Heinlein's wife Virginia made when their cat refused to leave the house: "He's looking for a door into summer."Heinlein wrote the novel in 13 days.
Pathological liars usually have a pattern, starting from the truth and embellishing it, rather than indulging in complete fancy.