The movie will be directed by Dana Stevens. Elizabeth Cantillon will produce the project.
As for the novel, it has been published in forty-five languages and has sold more than three millions copies in the United States. It spend 114 weeks on the New York Times Bestsellers List. The Wall Street Journal, Goodreads, and Buzzfeed has crowned the novel "The Best Book of 2015."
If you are interested in reading it, you can get a copy of the novel by clicking the link.
Source material: The Wrap