Kiai! and Mistress of Death — Piers Anthony

Volume 1: Kia! and Mistress of Death. Jason Striker is a 5 dan judo instructor who finds himself competing in a global multi-martial art tournament featuring extremely tough men and loose rules. He is marked for death, but manages to survive. In the second novel he runs afoul of the black karate mistress Ilunga and a deadly drug conspiracy. These are fast moving and violent stories, without ignoring human values. Piers Anthony knows how to write, and Roberto Fuentes knows martial arts and the ways of other cultures.