I am not sure what language this is (Czech?) but the book seems to be Prince Caspian, going by the prominence of Susan’s bow and horn, Reepicheep, and Trufflehunter on the borders. The second creature from the left could be one of the Bulgy Bears, or a de-maned Aslan. The goofy “wizard” of the central panel is, I’m guessing, a cartoony Dr. Cornelius, with a crystal ball. This is the oddest Narnia cover I’ve yet to see.