This is clearly a freshman effort and with that in mind it's not terrible, but it's not great either. The character development is a little forced and most of the main cast are one dimensional. The mystery isn't that great either. For the first half of the story we have a pretty good idea of who is doing what and why, it's really just a matter of how the protagonist will figure it all out.
One thing I found annoying is the author is British, but is writing American characters who all use British terminology and phrasing. For example, the hood of a car is called a boot, a football game is called a match, and the characters often say, "apart from" whereas Americans usually say, "instead of" "except for." I found that annoying.
Anyway, not sure if I'll read book two or not, but I don't have a great desire to.