Invaders. Book 3. Corners of the Past

Now Teddy is not a princess, but a real mouse queen, but this only brings more problems! Teddy and the bird prince Sol travel beyond the valley and discover a terrible secret of the flyers. To stop the war, Teddy divides the valley in time and opens a passage to the mouse world. But most of all, she wants to go back home with Dimka and her stepmother. What to do if the previous path suddenly becomes inaccessible? Certainly not sit and cry! Dimka and Teddy will have to go through several worlds, face dragons, terrifying nightmares, and new relatives. Will they be able to return home, to their world, or will they forever remain in the world of dragons?
For middle and high school age.

Queen Theodora: 'Now I am a queen! But did I ever dream of this? I am only fourteen, I want to relax and have fun, I even want to go to school already! And instead, I have to restore peace in the Unfortunate Valley and save my friends! Oh, how these quarrels between my mice, humans, and flyers have angered me! I will make your lives fun now! Just don't let me turn into an evil queen and lose my brother and step... Mom.
Don't be afraid, Dimka! I told you I would never abandon you. Together we will find our way home, even if we have to go through a thousand worlds and fight unknown monsters, dragons, and kings!'