The Grinch is a fictional character who has stolen Christmas from the Whos in the children's book How the Grinch Stole Christmas! by Dr. Seuss. The book tells the story of how the Grinch, a grouchy and solitary creature who lives on a cliff above the Whos, hatches a plan to steal Christmas from them. He sneaks into town on Christmas Eve, dressed in a Santa Claus costume, and steals all the gifts, decorations, and food from the Whos' homes.