The Incomparable Yabeda-Koryabeda

One ordinary autumn morning, the city of Ucromny changed beyond recognition. It had chocolate sidewalks, an edible Confectionery Museum, a zoo with prehistoric and fairy-tale animals, and many other amazing things. All of this was given to the city by the wicked sorceress Y. K. Koryabeda. What new trick of the cunning Yabeda-Koryabeda lies behind these wonders? Who will help to expose her clever plan? Who will find the courage to drive the wicked sorceress out of the city? The answers to these and many other questions can be found in this detective-mystery story.