According to Kanoon General Directorate for Public Relations and International Affairs, this is one of the volumes from the collection called “Stories of Investigation at School” suitable for age category above 15 (Adolescents).
“Cul-Vert le mystère du Loch Ness” (Complex Puzzle) is translated by Niloufar Akbari.

Jean-Philippe Arrou-Vignod is a French author and teacher who has studied French literature. He uses his childhood memories and those of his students to write his books, the readerships of this age category who are interested inhis stories.
In the summary of the book we read: “A dreadful British crypt, a horrific host, stolen jewelries, a poison specialist, … and a simple walk changes into an exciting story. Matilda, Ramy and Pier Paul are willing to solve the mystery. Fortunately, P. P. Coolver is here. With a magnifier in his hand, he is trying to find a solution to the mysteries...mysteries sometimes get complicated!
The book is published following the copyright regulations. It is purchased from Gallimard Jeunesse Publication, France.
It is reminded that previously the following books were published by Kanoon: “Investigation at School”, “The Disappeared Teacher”, “In Search of Golden Salamander”.