Hour of the Octopus — Joel Rosenberg

On the eve of a grand royal wedding, a nobleman is killed with a hunting arrow. The priceless tapestries of the bridal keep are stained with blood. And the fatal arrow bears the mark of the prime suspect--the bridegroom himself.

Only one person can solve such a crime. A man named Kami, who defied the Fifty-Two Ways of D'Shai... by creating a Fifty-Third profession.

The ancient world of D'Shai would call him Discoverer-of-Truth.

Today, we would call him one hell of a detective.