Attack of the Graveyard Ghouls is the 31st volume in the Classic Goosebumps series written by R. L. Stine. This thrilling book follows the story of a terrifying encounter with graveyard ghouls. It is available in paperback format and published by Scholastic Paperbacks. With its gripping storyline and spooky atmosphere, this book is a must-read for fans of horror and suspense.