The Mystery of the Old Wardrobe

Three friends — Ilya, Kira, and Sashka — unite as team "IKS" to investigate mysterious events. They learn, make friends, argue, and reconcile… and also take on cases that send shivers down even their teachers' spines!
 
When Kira and her friends... from the "IKS" team discover a secret laboratory of merchant Platonov in their school, they become the heroes of the day. But not for everyone. Tanya, Lera, and Olya — high school girls used to being the center of attention — are not going to accept that the new girl eclipsed them. It all starts with petty mischief: food thefts, mockery, jibes. But soon Kira is accused of breaking a window, and now she faces expulsion. Her father, a strict FSB officer, is already on his way to the school… Meanwhile, the old wardrobe in the teachers' lounge hides something more than just shelves.
 
The stories take place in a unique setting — a boarding school located in a former merchant estate of the nineteenth century. The author of the series, Svetlana Krivoshlykova, masterfully describes the mysterious atmosphere of the old building and the secrets it holds. The blend of the spirit of a closed boarding school with the modern lives of ordinary schoolchildren makes the reading exciting, while the unraveling of mysteries is memorable.