Dr. Maniac Will See You Now is a novella written by R. L. Stine. It is a part of the Goosebumps Most Wanted series. It was first published in 2013.
Description[]
When a group of comic book characters appear in the real world, twelve-year-old Richard Dreezer, must track down Dr. Maniac to save the day. Straight from the comic book of your worst nightmares, this evil genius will make sure you leave sicker than when you arrived.