Master of Children's Horror and Spooky Thrills
R.L. Stine is an American author best known for his 'Goosebumps' series, which brought accessible horror and spooky fun to millions of young readers around the world.
The Formula for Trouble(By: Megan Stine,William Stine) by R.L. Stine. Part of the Twistaplot book series.