Three heroes and navel of the Earth. Official novelization. Usacheva E.A.

Once upon a time, three heroes lived in Rus'... Stop! What happened before? Ilya, Dobrynya and Alyosha did not ask this question, but they will still have to look for an answer to him! And all because they were faced with the mysterious umbilical waist of the earth, which is a r-time! - And transferred them to the primitive world! Here were the prince with Julius, and also Gorynych!

Now you need to urgently look for the way home. But first you have to deal with wild tribes and... dinosaurs! Who is this navel of the Earth? And how to go back?