The Naruto anime мультсериал is so huge that on this site it has an entire separate subforum. It has more than 700 episodes of the main story, 72 volumes of the original manga, and a handful of full-length animated films (one of which even reached our cinemas). And now its ideational plot continuation, Boruto, is already being released. And such a large franchise produced a mass of various related merchandise, including small books based on the series, written by many different authors. All the books are either adaptations of the anime or side stories that are not important for the original plot. The books are fully self-contained, but to understand what’s going on, it is very desirable to know the original.