Naruto, Vol. 39 Book by Masashi Kishimoto

It's shades of the influence of Orochimaru when Sasuke names his new ninja cell The Hebi. While Naruto and the others try to keep tabs on Sasuke, their long-lost pal ends up in fierce battle with an old enemy. The outcome could bring the ninja world as Naruto knows it to an end faster than he ever imagined!