As an author, he is not skilled or interested in the true art of writing good prose. His books remind me more or a cheap and forgettable horror flick (maybe he's hoping one of his books will make it to film?). Writing is unatmospheric and undescriptive, and characters are two dimensional and unexplored.
Rather than letting a scene breathe or a conversation fully develop and reflect the psyche of the characters, he prefers to cut these moments off prematurely in favour of going to another presudo-dramatic 'set piece' which will be ultimately inconclusive and unsatisying in terms of developing the central mystery of the story, and only ever hint at some form of action or excitement.
The dialogue simply serves the purpose of moving the plot. Very clichéd. It makes for uninteresting and generally unlikeable characters. Like how some dumb teens would speak in a horror flick. Lots of disagreeing and pointless arguing.
There was a moment towards the end where one of the characters explained the mystery in exhaustive terms, thus making the action that followed entirely predictable, as the character had clearly laid out the plot points for the last 20-30 pages.
There was a period in the middle of the book where things really moved very slowly. He had set all the pieces in place to advance the plot but chose to be stubborn and not move them, which was quite frustrating. For all the quick, choppy pace of the narrative, the only moments of meaty action happen in the last couple dozen pages.
When it comes to the 'scare factor', which many of us obviously seek when we chose a horror title, well, as I said, he has a horror flick sensibility and is not a serious practitioner in the art of prose, and therefore his writing is devoid or nuance or atmosphere. The violent and graphic moments in the book (there are a few, repetitive descriptions like this) had no impact for me due to this, and were simply unpleasant. No eeriness, no spookiness.
If you want a good British horror writer, go with James Herbert; if you want a good gore fest with a fast plot, go with Richard Laymon.
This guy just wants to make it to the big screen, and has admitted in an interview that he doesn't actually read (wish I could find where I read this, but I always like to do research about new authors I encounter). Anyway, it shows.