Ajin: Demi-Human Complete manga omnibus volume 1 collects volumes 1-3 and features story and art by Gamon Sakurai.

For Kei, and at least forty-six others, immortality comes as the nastiest surprise ever. He's a rare specimen who needs to be experimented on for life—a demi-human who must die a thousand deaths for the benefit of humanity…

The breathless nightmare trip Ajin: Demi-Human, finally available in omnibus format. A thriller that just keeps on getting better and deeper.