Knock Three Times!

Knock Three Times! is a children's fantasy novel by Marion St. John Webb, first published in 1934. The story follows twins Jack and Molly on their ninth birthday when a peculiar grey pumpkin pincushion from their Aunt Phoebe leads them into a magical adventure. As they navigate the Possible World, they confront the malevolent Grey Pumpkin and embark on a quest to find the Black Leaf, which holds the power to contain it. The book is notable for its imaginative storytelling and has captivated young readers with its thrilling and eerie elements.