Continuation of the detective series with riddles and puzzles, sold in France with a total circulation of more than 30 thousand copies. Olivier loves school trips. But this time the plans go awry: due to a blizzard, the roads are covered with snow, and instead of excursions to medieval castles, the whole group gets stuck in a small, unremarkable village... However, is this village really so ordinary? They say that more than a hundred years ago a local priest found a treasure here, thanks to which he became fabulously rich! And some of his treasures may still be hidden somewhere nearby... Olivier and his friends immediately begin their search. But in order to find the treasured riches, they will have to cope with many insidious mysteries! Features of the book - French Amazon bestseller in the children's detective genre - The series was sold in France with a total circulation of more than 30 thousand copies in the first year of sales - Introduces children to the world of detective literature - Fascinating plot and charming characters that will be close and understandable to children. Who is this book for? For children from 12 years old. For fans of exciting detective stories. For fans of historical mysteries. For everyone who likes to solve puzzles. Published in Russian for the first time.