Something Wicked This Way Comes is a 1962 novel by Ray Bradbury. It is about two 14-year-old boys, Jim Nightshade and William Halloway, who have a harrowing experience with a nightmarish traveling carnival that comes to their Midwestern town one October. The carnival's leader is the mysterious "Mr. Dark" who bears a tattoo for each person who, lured by the offer to live out his secret fantasies, has become bound in service to the carnival. Mr. Dark's malevolent presence is countered by that of Will's father, Charles Halloway, who harbors his own secret desire to regain his youth because he feels as though he is too old for Will.
The novel combines elements of fantasy and horror, analyzing the conflicting natures of good and evil, and on how they come into play between the characters and the carnival. Unlike many of Bradbury's other works, including the tangentially related Dandelion Wine, which is a collection of loosely related short stories, Something Wicked This Way Comes is a full-length novel.