Escape / Barbara Delinsky.

Enhanced descriptions from Syndetics:

In her luminous new novel, Barbara Delinsky explores every woman's desire to abandon the endless obligations of work and marriage--and the idea that the most passionate romance can be found with the person you know best.

Emily Aulenbach is thirty, a lawyer married to a lawyer, working in Manhattan. An idealist, she had once dreamed of representing victims of corporate abuse, but she spends her days in a cubicle talking on the phone with vic­tims of tainted bottled water--and she is on the bottler's side.

And it isn't only work. It's her sister, her friends, even her husband, Tim, with whom she doesn't connect the way she used to. She doesn't connect to much in her life, period, with the exception of three things--her computer, her BlackBerry, and her watch.

Acting on impulse, Emily leaves work early one day, goes home, packs her bag, and takes off. Groping toward the future, uncharacteristically following her gut rather than her mind, she heads north toward a New Hampshire town tucked between mountains. She knows this town. During her college years, she spent a watershed summer here. Painful as it is to return, she knows that if she is to right her life, she has to start here.