Three kids venture to the North Pole to help Santa defeat an army of evil elves in this holiday classic from the brilliant mind that brought you The Fantastic Flying Books of Mr. Morris Lessmore.

Art Atchinson Aimesworth—inventor, crime fighters, and all-around whiz kid—journeys north with his sister, Esther, and his pal Spaulding, by special invitation from Santa himself. Why did Santa call them to the North Pole? Art wants to know. But when Esther is taken by the Queen of the Dark Elves, Art must put his questions aside and save his sister.

This reissue of William Joyce’s epic Christmas adventure now comes complete with lift-the-flap letters from Santa himself!