One Step Too Far by Tina Seskis

I begin work today on a novel by Tina Seskis named One Step Too Far. From what I gather this is Seskis' debut novel and it's being flagged as the "must-read" of the summer. I'm anxious to see what the next best thing is and thankfully Netgalley has provided a copy and I'm hoping good things to come of this novel.

Synopsis:  Essentially, there is no reason for Emily Coleman to leave her life. She has a beautiful son, a nice home, and a seemingly happy marraige. So why does she wake up one morning and leave it behind? Could it be her twin sister Caroline who seems to hate her? Maybe it's a mental breakdown and she's finally broken. No one knows.