Board Thread:Episode Discussions/@comment-1181222-20170809100834/@comment-32569165-20170811200236

Thekillman wrote: Crazylazyguy wrote: The book seems relatively new, I'd say that it was indeed Sasuke. After all, he was there when Tobirama explained everything about the Sharingan. It's probably a collection of new information, including declassified stuff like Tobirama's research. I don't see when Sasuke could've written it. I mean he had plenty of time when he was on the go. There are 2 possibilities - Sasuke or Orochimaru. Nobody else was there when this was explained. It could have been Orochimaru. But nobody else would know that. I doubt Sasuke sat down with Naruto and started explaining to him what Tobirama said about his clan.