The Mystery of the Dead Rector. Book 1

After a grand and bloody battle, Count Averkyn and Kuzya join the Administration. The heroes have earned a break, but even in their native St. Petersburg, times are not the calmest, and to top it all off, a tragic incident occurs at the Moscow Wizarding Academy: under strange circumstances, the rector dies, and the strongest demon is at large. But why is Hermes Averkyn specifically invited to investigate? Kuzya and Vladimir also take on the case, but there is no evidence against the main suspect. And what connects him and Vladimir?