The Big Over Easy is a novel written by Jasper Fforde and published in 2005. It features Detective Inspector Jack Spratt and his assistant, Sergeant Mary Mary. It is set in an alternate reality similar to that of his previous books: The Eyre Affair, Lost in a Good Book, The Well of Lost Plots and Something Rotten. According to Fforde, The Big Over Easy is the result of the book Caversham Heights featured in The Well of Lost Plots and includes a possible cameo appearance of the author's heroine Thursday Next, thus verifying this claim.