The Princess Bride is a 1973 fantasy novel written by William Goldman. It was originally published in the United States by Harcourt Brace, while in the UK it is/was published by Bloomsbury Publishing.
The book combines elements of comedy, adventure, fantasy, romance, and fairy tale. It is presented as an abridgment of The Princess Bride by S. Morgenstern (though no such book exists), and Goldman's "commentary" asides are constant throughout.
It was made into a film of the same name in 1987 by Rob Reiner, and an attempt to adapt it into a musical was made by Adam Guettel.