A unique picture book by Eric Carle for little explorers! One evening, Felix finds a letter under his pillow with eight mysterious symbols that need to be deciphered. "When the moon rises, go towards the brightest star. You will come to a large stone." Step by step, Felix unravels the mystery of the eight symbols and discovers a big surprise at the end. Even very young children can join in this exciting search by following the symbols through the rounded, jagged, or cut-out pages of the picture book. In a playful way, they learn about the connection between symbols and their meanings.