I'm not sure of the precise count. However, Naruto Shippuden has a substantial collection of manga that have captivated fans with its extensive and engaging narrative.
The number of Naruto Shippuden manga books is 72. These books take you on an epic adventure with Naruto and his friends in a rich and detailed narrative.
Sure. The characters are a huge part of Naruto Shippuden fanfiction. Fanfic writers use the characters to attract readers who are fans of those characters. They might focus on a character's backstory that wasn't fully explored in the anime and expand on it. Also, the interactions between characters in the original show give fanfic writers ideas for different scenarios in their stories.
By their unique abilities. Naruto's Rasengan, Sasuke's Sharingan, these abilities can be the starting point for many fanfiction ideas. Writers can think about how these abilities could be used in different battles or situations not shown in the original.