Guest Fist of Eden (拳客のエデン, Ken Kyaku no Eden) is the 4th volume in the series.
- Chapter 9: E-den of Master Fighters
- Chapter 10: One Butler's Blitzkrieg
- Chapter 10.5: Cherchez L'idole
Libra agent Zap has been kidnapped, and to free him Klaus von Reinhertz must battle a procession of horrors from the Beyond, ultimately to face one of the terrifying Blood Breed. But was Zap really kidnapped, or is something more sinister in play to draw Libra’s head honcho into the ring?