We Are Okay meets They Both Die at the End in this YA debut about queer first love and mental health at the end of the world—and the importance of saving yourself, no matter what tomorrow may hold. Avery Byrne has secrets. She's queer; she's in love with her best friend, Cass; and she's suffering from undiagnosed clinical depression. But on the morning Avery plans to jump into the river near her college campus, the world discovers there are only nine days left to live: an asteroid is headed for Earth, and no one can stop it. Trying to spare her family and Cass additional pain, Avery does her best to make it through just nine more days. As time runs out and secrets slowly come to light, Avery would do anything to save the ones she loves. But most importantly, she learns to save herself. Speak her truth. Seek the support she needs. Find hope again in the tomorrows she has left. If Tomorrow Doesn't Come is a celebration of queer love, a gripping speculative narrative, and an urgent, conversation-starting book about depression, mental health, and shame.