The Secret of the Amusement Park

Where will the mysterious manuscript lead the young detectives?
For lovers of codes and puzzles.
Continuation of the detective series for teenagers.

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

For middle school children.