The curious teenager Goshka’s parents send him to Brazil to search for rare plants. For the whole vacation, their son is entrusted to his grandfather, who is far away in Siberia and studies animal behavior. Goshka ends up at a bioscience station and dives headfirst into a new, unbelievably exciting life. Intuitively, he understands that the most interesting for him will be wolves. And that’s exactly what happens. Goshka manages to establish a close bond with a she-wolf named Donna and begins to conduct truly scientific observations of her behavior. One unquestionable strength of the book is the relationships between different children and adults, built plausibly by the author—without lecturing, but with precise educational emphasis. Also, between the lines, and between tense plot lines, the author tells a lot of interesting and useful things about biology and zoology.