Дело о похищенной собаке

"Berta is missing!" — with these words began one winter morning for brothers Seva and Misha. Did the boys think that their vacation in the village would turn into a new detective adventure?! They just had to wait for their friends — Tosya and Tamusya — equally restless lovers of investigations and mysteries, and get to work!
The theft of a purebred dog — it seemed that there was nothing complicated about this event. After all, the puppy can be sold at a good price. But no! Secrets lie in the details! So quickly open the book and together with its main characters, piece by piece, gather the keys to solving the unusual theft.