This is a new series, written by Björn Berenz and Christoph Dittert, for adventurers and puzzle fans from the age of 8 .

Each volume contains a new, colorfully illustrated diary with riddles and tips for puzzling, doodling, cutting and handicrafts. The father of 11-year-old Lias is missing while searching for mysterious people that are living in the Himalayas. Suddenly Lias receives his expedition diary - full of clues and riddles that only Lias can solve and that can lead him to his father. For Lias an adventure of a lifetime begins.

The special thing about it: the readers are right in the middle of it all, solving puzzles, cracking codes and getting a little closer to the goal with every hint. And in the end they have to decide: How should the adventure continue? Choose book 2, 3 or 4 and immerse yourself in a whole new story. Does your path lead you through lava and fire? Or through ice and snow? Do you run into dangerous dinosaurs along the way? No matter how you decide - you can expect an unforgettable adventure at the side of Lias and his friends!