Every month, a letter. That's what Lauren decides to leave her husband when she finds out she's dying.

Kristan Higgins is the New York Times, USA TODAY, Wall Street Journal and Publishers Weekly bestselling author of 18 novels, which have been translated into more than two dozen languages. Her books have received dozens of awards and accolades, including starred reviews from Kirkus, The New York Journal of Books, Publishers Weekly, Library Journal and Booklist. She is a five-time nominee for The Kirkus Prize for Best Work of Fiction, and her books regularly appear on the lists for best novels of the year of many prestigious journals and review sites. http://www.kristanhiggins.com

Have you ever considered how dramatically different your life would be if you made different choices?

Sarah Zachrich Jeng grew up in Michigan and always had a flair for the morbid and mysterious (for her dad’s thirty-fifth birthday, she wrote a story entitled “The Man Who Died at 35”). She had a brief career as an aspiring rock star before she came to her senses and went back to school to become a