Hey, you know what?  Women like this genre of books, too.  Invading monsters, an unlikely hero, action and adventure.  These are all present and accounted for in this novel.  What isn't there is an eye for a wider audience.  I get that Dave is supposed to be the last guy on Earth anyone would choose to be a hero.  I understand that his back story of being a schmuck and a generally not great guy adds to the feeling of redemption.  But honestly, he is such a misogynistic, self destructive piece of work, I was kind of hoping the monsters would win.
I liked the supporting characters and the exploration of the monster culture and hierarchy.  The pace of the story clipped right along and there wasn't a lull in the action.  I wanted to find out who lived and who met a gory end.  Unfortunately, I found myself hoping Dave would be the next casualty. Having to  endure his inner dialog was not my favorite way to spend an evening.