Kosmos Die drei??? Kids, Das geheime Buch

Justus, Peter, and Bob make an exciting discovery: a secret book with locked pages! What could it be about? Not only the intuition and determination of the three detectives are needed here, but it will also take a lot of courage for the readers to cut open the pages. On every second double page, they read exactly what the investigators are currently reading in the secret book. Excitement and thrill are guaranteed in this extraordinary "book within a book.".