I Am Slappy's Evil Twin is the third book in the Goosebumps SlappyWorld book series, and the tenth book in the Living Dummy saga. It is set to release in 2017.

The cover of the book features Slappy in a chair; he appears to be confused. His twin brother Snappy is behind him, with a menacing look.


Luke Harrison's dad makes horror movies. It is a lot of fun being around a lot of such scary stuff - especially when you have your own monster museum at home. But when two ventriloquist dummies - Slappy and his twin Snappy - join the collection, things get real creepy. Slappy and Snappy can walk and talk on their own. And they can make you scream on their own. They have a plan to make everyone's lives miserable. Will Luke be able to stop this terrible twosome?[1]




  • This book was first announced by R.L. Stine during an interview, and later confirmed by Scholastic's website. [2][3]
  • The title sounds similar to I Am Your Evil Twin.
  • This is the third Living Dummy book to feature a second dummy as an ally to Slappy instead of an enemy.


  1. I Am Slappy's Evil Twin (Amazon) (mirror)
  2. SlappyWorld Interview: "I Am Slappy's Evil Twin"
  3. SlappyWorld Book #3 (Scholastic Website)
Goosebumps SlappyWorld series
#01 Slappy Birthday to You#05 Escape from Shudder Mansion
#02 Attack of the Jack
#03 I Am Slappy's Evil Twin
#04 Please Do Not Feed the Weirdo

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