New Year's Disappearance: The Fluffy Detective

On the eve of the New Year, when all the letters have been read and the bags of gifts are prepared, misfortune struck: Santa Claus forgot an important letter from the boy Nikolka on the table, and it disappeared. Who... took the letter? The mischievous rascal Ryzhik? The noisy know-it-all squirrels? Or the shy little Ears, who really wants to become Grandpa's assistant? But whoever is to blame, the missing letter must be found quickly, otherwise Nikolka's grandmother won't receive her gift in time for the holiday.
Ryzhik and Ears will become true detectives: they will try to trace the path of the lost letter and take part in an important scientific investigation, making many discoveries along the way.
The book is aimed at children aged 5 and up.