1. Goosebumps #1: Welcome to Dead House (1992): This is the first book in the wildly popular Goosebumps series, known for its spooky stories geared toward children. It introduces the main character, a boy named Zach, who moves into a creepy old house and encounters strange happenings.
2. Fear Street #1: The New Girl (1989): This is the first book in the Fear Street series, aimed at a slightly older audience than Goosebumps. It sets the tone for the series with a mysterious new girl who arrives in Shadyside, a town with a dark history.
3. The Nightmare Room #1: The Haunted Mask (1995): This is the first book in the Nightmare Room series, which takes inspiration from classic horror films. It features a boy who finds a mask that transforms him into a terrifying monster.
These are just a few of the many books R.L. Stine has written. He's a prolific author who has penned countless novels across various series and genres.