Introducing... The Girl on the Train by Paula Hawkins

Introducing books through the first chapter or so...

She's buried beneath a silver birch tree, down towards the old train tracks, her grave marked with a cairn. Not more than a little pile of stones, really. I didn't want to draw attention to her resting place, but I couldn't leave her without remembrance. She'll sleep peacefully there, no one to disturb her, no sounds but birdsong and the rumble of passing trains.

-- The Girl on the Train by Paula Hawkins