The Secret of the Amusement Park

Where will the mysterious manuscript lead young detectives?
For lovers of ciphers and puzzles.
A continuation of the detective series for teenagers.

Olivier and his friends run a vlog about the mysteries of the past. One day, he receives a strange letter from a subscriber: a boy named Noah begs for help.
What does the mysterious manuscript, so carefully kept by Noah's father, hide? And why does Noah's aunt dream of getting this book? For answers, the heroes will go to Paris — to a huge amusement park!

For middle school children.