The Monster at the End of This Book is an interactive mystery board book starring lovable Sesame Street character Grover. Grover is afraid of the monster at the end of the book and tries to prevent the reader from turning the pages. Children can lift the flaps and turn the pages to discover that the monster is actually Grover himself. The mystery builds as Grover becomes more and more anxious, creating a sense of anticipation and excitement. This playful book is a hit among young readers.