u/AccomplishedLie898

It's in Russian, for children, and takes place in the USSR or post-Soviet Russia. The book's premise is that lying is bad. The plot goes like this: a boy finds a spell book in the attic of a neighboring house and reads a spell from it, after which every lie he tells and someone believes becomes true. He immediately goes to his friends and tells them that his uncle has come to visit and given him a gun and an airship (Every Soviet boy dreamed of this, I guess). They believe him, and it becomes true. I don't remember much of the rest of the plot, I just remember that in the end, this force turns against him. The specific moment I remember from the end of the book is how the house where he found the book catches fire, and the boy, in order to save the book, lies to a firefighter that he lives in the house, and the next second his mother and grandmother run out from that house trying to save their things from the fire. In the end he loses his powers and never lies again or something like that. My grandma used to read me that book when I was like 9, I tried asking her but she doesn’t seem to remember a book with that plot. Reddit, you are my last hope!(Sorry for my bad English, it’s not my first language)