Kosmos The secret treasure

Luzia and Anup are determined to search for the treasure of the "Blue Cave," around which so many legends swirl. Unfortunately, Peer, the class bully, has the same plan – and the second half of the old map that the two desperately need. Will the three of them manage to overcome their conflict and combine their skills? If not, they face great danger.

Clues can be hidden anywhere in the book, creative solutions are required, cutting out, drawing, folding – anything goes.