The eagerly anticipated companion to New York Timesbestseller Every Day.

Bestselling author David Levithan (co-author of Will Grayson, Will Grayson with John Green) tells Rhiannon's side of the story as she seeks to discover the truth about love and how it can change you.

Every day is the same for Rhiannon. She has accepted her life, convinced herself that she deserves her distant, temperamental boyfriend, Justin. She's even established guidelines by which to live- Don't be too needy. Avoid upsetting him. Never get your hopes up.

But one morning everything changes. Justin wants to be with her for the first time, and they share a perfect day-a perfect day Justin doesn't remember the next morning.

Confused, depressed and desperate for another great day, Rhiannon starts questioning everything. Until a stranger tells her that the Justin she spent that day with-the one who made her feel like a real person-wasn't Justin at all.