The trace of the dragon. Trubachev N.

To the great joy of Artem and Bear, they become members of the expedition, exploring the fossils of the prehistoric era. Everything is in an adult way: they are trusted with serious work, which many scientists dream of. We can say that the life of friends, only having begun, was already a success. And they are happy. But as soon as the guys begin to work, as they notice that strange, inexplicable things are being done in the camp of scientists and near him. Either animals disappear without a trace, then some mysterious shadows glide silently between trailers in the night, otherwise the safe disappears from the economic tent. Artem and Mishka begin to investigate...

for secondary and senior school age.