R.L. Stine 
Goosebumps: Most Wanted: Dr. Maniac Will See You Now [EPUB ebook] 

The infamous, Most Wanted Goosebumps characters are out on the loose and they’re coming after you! Catch them all, undead or alive! The Most Wanted list continues with Dr. Maniac, the strangest doctor of them all. 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.