A review by crookedtreehouse
Blade of the Immortal Volume 7: Heart of Darkness by Hiroaki Samura

4.0

This is the first volume where espionage creeps into the narrative, and it's a blast. Who is betraying whom? What are the Itto Ryu up to? What happens when our protagonists faces start showing up on wanted posters?

This would even make a good starting point if someone wasn't interested in reading the whole series. But, as a part of the ongoing story, it's an absolute blast.