The main character here is the setting--Michigan's Upper Peninsula. It was a great book to read on a hot summer day because, trust me, you'll be chilled all the way through from the author's descriptions of the weather and the landscape! If you don't live in the northern Midwest, this setting will probably seem as alien as the moon, but it is accurate down to the smallest detail.
I really enjoyed the "official" main character, Alex McNight, and his friends. Their personalities and conversations seemed so true-to-life. Alex in particular makes a lot of really STUPID decisions! But they're all in the cause of justice and chivalry, and the author's talent for characterization makes Alex's choices understandable.
My least favorite element of the book was the plot, so if that is what matters most to you, then I'd suggest choosing a different book. As events progressed, they seemed to become a tad, shall we say, far-fetched--but still enjoyable enough to earn 4 stars and to make me eager to read the next book in the series.
Warning: Major spoiler ahead but I couldn't resist ******* Unfortunately, the thought that lingered with me at the end was, "So he went through all this torture for nothing?!"