About the book: 2018 / “You yourself will perish, but help your comrade,” - that’s what Yanka thought when she went as a counselor to a children’s camp instead of her sick friend. An old manor, a forest, games - what could be more interesting? And if you meet a ghost in the dark corridors, accidentally read someone’s request for help in a tattered book and go to an abandoned chapel to solve an ominous mystery, then your vacation will definitely be remembered for a long time! Yanka will never give up on adventures! “The Key to the Day After Tomorrow” is mysterious letters from the past, a detective investigation - no adults! – new friends with whom you definitely won’t get bored, and first love…