A collaboration from the New York Times best-selling authors of All The Bright Places and Every Day comes a story of hope, siblinghood, and finding your home in the people who matter the most.

Subject: You. Missing.

Bea and Ezra Ahern grew up knowing they'd always be there for each other. They had to be, or nobody else would: not their abusive step-father, their neglectful mother, and definitely not their father, who was never in the picture. So when Bea runs away from home, her brother Ezra feels left behind--until he finds the secret email account Bea set up so that they could stay connected.

Before long, Ezra is forced out of the home as well, and the siblings find solace in sharing their journeys with each other: from new and old romances, to family secrets and, ultimately, learning to trust other people as well as themselves.

Jennifer Niven is the #1 New York Times and internationally bestselling author of All the Bright Places and Holding Up the Universe. Her books have been translated in over 75 languages, and have won literary awards around the world. When she isn't working on multiple book and TV projects, Jennifer also oversees Germ, a literary web magazine for high school age and beyond. Jennifer divides her time between coastal Georgia and Paris. Find her at jenniferniven.com and on social. David Levithan's many acclaimed novels include Someday, Another Day, Every Day, Two Boys Kissing, and Boy Meets Boy. His bestselling collaborations include Nick & Norah's Infinite Playlist and the Dash & Lily series (both written