The Executors. Book 3. The Shadow of Chernobog

After long and hard adventures, Katya Miroshkina finally returns to her parents in the world of gods. All dangers have passed, but the girl feels more alone than ever. She had to part with Yarushka and Mogina, everything around is... foreign and unfamiliar, and her parents cannot give Katya any time: her mother is constantly busy, and her father avoids her. In an attempt to talk, the girl accidentally overhears her parents arguing about her: on her long journey home, she left a passage open to the world of gods. It was used by a thief who sneaked into the palace of Veles and stole important diaries. Veles and Makosh believe that they were taken by a minion of the Byzantine emperor, as the states are on the brink of war. However, the diaries got lost in the world of humans along with the thief.