Wicked Bronze Ambition is the fourteenth book in the Garrett P.I. series by Glen Cook.
Garrett’s fiancé was born on the Hill and his soon-to-be family-in-law is filthy rich. They’re all sorcerers too, and that puts them in a tight spot, because someone has it out for them. Or rather, their children and grandchildren. A grand underground tournament has been set up and is meant to be a battle-royale type: the kids are in it if they want to or not. And whether they have actual magic powers or not. This case gets very close for Garrett personally because someone he loves has died and now he is out for revenge.