I'd do nothing but reading if I could (ok, maybe eat some great food, buy some fancy shoes between two books...oh, and spend some quality time with the gorgeous guy I married while I am on reading-break anyway...)
It is a stand alone - no Hercule Poirot or Miss Marple.
A brilliant one - and quite creepy. As always the hints give you a face-palm-moments when the culprit is identified, because it seems so obvious. But only in hindsight...