I really enjoyed Frostarc. It's a sci-fi apocalypse type story with intelligent zombies and the big question: Who is Kozz and what is he hiding from?
I'm a fan on the zombie genre but feel it is getting a little tired and overdone as of late. Frostarc is a refreshing new take on zombies. The infected are intelligent. They can set traps, tear apart vehicles and communication devices, and they can be healed. Yes, it's possible to heal.
There is more plot and suspense than actual blood and gore. McMahon doesn't rely on shock factor to draw his readers in. So, good on him :)

I liked the characters. Kozz, the main character, is rough around the edges and has some secrets that as a reader you're dying to uncover. There are clear set bad guys and good guys and you really don't like the bad guys.

McMahon writers great dialogue and setting. His descriptions are beautiful. But, I felt he internalized thoughts a little too often, taking the reader out of the action, so to speak, more than I'd like.
I'm not too familiar with omniscient viewpoint, but I think that's what Frostarc is written in. It took a little getting used to, and I can't say I'm a huge fan, but McMahon does seem to pull it off without confusing the reader as to whose head we're in.
There is a cliffhanger ending, so don't expect a neatly tied up story. I wasn't nearly ready for this book to end when it did, and can't wait for book 2.

I'm giving Frostarc 4 out of 5 stars.