Mercy Watson is a series of children's books written by American author Kate DiCamillo and illustrated by Chris Van Dusen. The eponymous Mercy Watson is a fictional pig - often described as a "porcine wonder" by her owners Mrs. and Mr. Watson - who loves toast with 'a great deal of butter on it'.
Mercy Watson Goes for a Ride was a Theodor Seuss Geisel Honor Book in 2007 — one of three runners-up for the Geisel Award.
Eight Mercy Watson books were published from 2005 to 2022 by Candlewick Press of Somerville, Massachusetts.