First up, be aware that this is the third book of a series. So, if you want to read them in chronological order, start with Unwanted, then Silenced, and then The Disappeared.
Second, to cut to the chase, this is a well written police procedural, with an excellent plot, and believable (albeit sometimes bumbling) police characters.
The book starts with several apparently unconnected threads which the author skillfully weaves together, gradually. The main investigation starts with the discovery of the dismembered body of a missing female student. As shocking as that is, the discovery of other bodies signals that this is no isolated incident, though the nature of what exactly is going on eludes the police until the finale.
To varying degrees, the key detectives are personally connected to the investigation. Perhaps that explains their less than stellar progress, although it is also possible this is more realistic than the literary version of criminal investigation.
Without giving away too much of the plot, I just want to mention that although I had a rough idea of the baddie’s identity from early on, the author does a terrific job of making the red herrings part of the misdirection, but still relevant. And the fine pacing that makes this a real page turner, helps towards making this a great read.
In short, recommended.