If this book weren't the last of the excellent "Way of the Tiger" ninja series, it would deserve 4 or 5 stars. Unfortunately, "Inferno!" seems to have been the final book of the series. The problem stems from the fact that the book's "ending" is not really an ending. The hero's main quest remains unfulfilled at the end, robbing the story, and the entire series for that matter, of a satisfying conclusion.