Mo Hayder never fails to deliver, and this novel is no exception.

When a popular teen is brutally raped and murdered, a detective throws caution, and possibly her career to the wind, to find the killer. But her personal life is unraveling, and the secrets she thought she left in the past are rising up once more.
Hayder keeps the tension high as two sisters, estranged for years, are brought together by a killer, and people are never who they appear to be.....

Fantastic twists and turns abound......and the last twist....a gut punch.

Highly recommended

It felt like that sometimes.

It picked up very  nicely, though it took long enough though.

A shitty way for Essex to take his leave.

It should have been Diamond.

Okay, I take it back.  At least some of it.  :  )

It's still feels slow, but we've got a twofer, and it's skin crawling creepy.

 edit:  and my favorite characters are:

Quinn, a no nonsense, stick her arm into a nastily (and i do mean nasty - made my lip curl while reading it) clogged toilet to pull out some tights and comment that they'll have to be dried while the detectives are trying not to puke.  She also crawled head first and waist deep into a dumpster (wheelie bin) without batting an eye.

Essex, the comedian unless stuff gets serious then he's rock solid so far.

After they see curtains opened with large hands:

"I don't like this, Jack."

"What're you talking about? It's just a little old lady."

"Dressed to Kill," he hissed. "Dressed to fucking kill, that's what I'm talking about."

This has to be the most boring thriller I have ever read.

We know who, we know why.

Unless there's some weird surprise, we're just hanging out waiting for the police to find who it is.  And for DI Diamond to be handed his ass.

It was all her!  I think.

And we never find out WHY!  Though we can guess.

A religious group buys an island and cuts themselves off from the rest of the world. 

Then divides up the island because they think their leader has broken a rule and gone nutty after his wife dies.

Or maybe nuttier.  Couple of opportunistic whack jobs from the get go.

It felt a bit choppy and disjointed, but a nice slow burn to the end.