6 books in series

The Yagyu Ninja Scrolls

The Yagyu Ninja Scrolls is a 6-book series with 6 primary works first released in 2005 with contributions by Futaro Yamada.

The Yagyu Ninja Scrolls: Revenge of the Hori Clan, Volume 1
The Yagyu Ninja Scrolls: Revenge of the Hori Clan, Volume 2
The Yagyu Ninja Scrolls: Revenge of the Hori Clan, Volume 3
The Yagyu Ninja Scrolls: Revenge of the Hori Clan, Volume 4
The Yagyu Ninja Scrolls: Revenge of the Hori Clan, Volume 5
The Yagyu Ninja Scrolls: Revenge of the Hori Clan, Volume 7