Akuma no Keiyaku - The Demon's Contract

By Ricardo Richter

"Discipline is Jakob's anchor - until the shadow finds him."
Jakob Merz lives for the precision of martial arts. Fifteen years of rigorous discipline have made him a Sensei who commands perfect mastery over body and mind. But when he discovers a sealed scroll titled Akuma no Keiyaku in the estate of his late Master Tanaka, a power erupts into his life that cannot be controlled through katas.
Kizu, an ancient entity of shadow and memory, binds itself to Jakob. Suddenly, the Sensei is no longer alone in his own body. As the boundaries between human will and supernatural force blur, Jakob must make a choice: fight the intruder, or embrace a partnership that pushes him beyond the limits of human possibility.

• Format: Paperback
• Language: English
• ISBN: B0GJPNF7TD
• ISBN13: 9798245458212
• Release Date: January 2026
• Publisher: Independently Published
• Length: 402 Pages
• Weight: 0.92 lbs.
• Dimensions: 0.8" x 5.3" x 8.0"