Sarah Weinman fielded this from John Rickards and made it into a meme: "if you change one letter in a book title, what do you end up with?"
Some of mine:
THE LOST ASSASSIN - Regaining consciousness on an unfamiliar tropical island, John Rain must piece together how he got there and how to get home.
MYSTIC RAVER - A witch takes on the underground club scene.
SET CHANGE - Jesse Stone pursues a disgruntled stagehand who's made off with key props hours before opening night of a play.
A SAVAGE PEACE - Spenser must root out sinister dealings in a seemingly idyllic retirement community.