Landline by Rainbow Rowell
Landline starts with scriptwriter Georgie McCool telling her husband Neal that she won't be able to go with the family to spend Christmas with his mother because she has too crank out a new script for her dream pilot. Their marriage, already rocky, suffers as a result and off the husband goes with Georgie's 2 daughters. Georgie tries to keep in touch with the family but her cell phone keeps dying. Then one night she tries to call using her mother's phone and finally gets a hold of Neal, only it is the Neal of the past, before they got married. Through conversations with this Neal, Georgie begins to realize how much the couple has lost as the years progressed.
Rainbow Rowell's Eleanor and Park was a very popular YA book and this novel, aimed at adult audiences is proving to be popular as well. The only thing I had a problem with in the novel was that the blamed seemed be one-sided and current day Neal seems one-dimensional.