The narrator is Thomas, and the story is in third person point of view.
The mood of the story is, most of the time, very intense. A lot of it is extremely emotional and has a very "keeping you at the edge of your seat, dreading what's going to happen next" attitude to it. There isn't a second in the book where I didn't feel on edge so far.
The author seems to have an almost menacing tone, taking joy out of watching his readers get anxious about the plot.