It's a great story with a strong buildup – and that ending! It's got me curious about the next couple of books, and where the story will go...
If thrillers are your thing, [[The Dead Room by Chris Mooney]] is a great read with some very gruesome scenes. For something a bit darker, [[Her Darkest Nightmare by Brenda Novak]] is a thriller with a distinctly chilling tone which I absolutely loved. You might also enjoy [[A Clean Death by Adriaan Verheul]].