The Russian folk tale (The Unsmiling Tsarevna) is widely available for free download and online reading in various formats. Below are the best sources to access the book:
Offers the text for online reading with pictures, as well as free downloads in PDF and DOCX formats. tsarevna nesmeiana kniga skachat
If you are looking for a historical edition, you can view a digitized 1964 version from the Russian State Children's Library. The Russian folk tale (The Unsmiling Tsarevna) is