Koa Kāne Hawaiian Mystery by Robert McCaw (series)

From Book Trigger Warnings

Koa Kāne Hawaiian Mystery is a series of adult mystery/thriller novels by Robert McCaw. It includes the following books:

Book # Title/Author
1 Death of a Messenger by Robert B. McCaw
2 Off the Grid by Robert B. McCaw
3 Fire and Vengeance by Robert McCaw
4 Treachery Times Two by Robert McCaw