Since the book is a literary classic, it is widely available on major digital platforms:
It sounds like you're looking for information on the classic story (often subtitled "Several Stories from the Life of a Very Small Boy" ), written by the famous Soviet author Vera Panova in 1955. Key Highlights of the Story kniga serezha panova skachat
The story follows 6-year-old Seryozha, who lives with his mother in a small town. His world changes when a new man, Korostelev, enters their life as his stepfather. Unlike many "evil stepfather" tropes, Korostelev becomes a true friend and mentor to the boy. Since the book is a literary classic, it