* _Cut and Run_ (2012)
* _If You Ask Me_ (2014)
* _What to Say to a Girl_ (2015)
* _The Girl Who Fell Apart_ (2016)
* _And If I Can't_ (2018)
* _We Both Die at the End_ (co-authored with Adam Silvera, 2017)
* _You Have to Live Twice_ (co-authored with Adam Silvera, 2021)
Short stories:
* "The First Time I Met My Best Friend" (2015)
* "The Day I Died" (2016)
* "The Last Time I Saw You" (2017)
* "The Time I Almost Kissed a Girl" (2018)
* "The Day I Got Fired" (2019)
Essays:
* "On Being Young and in Love" (2015)
* "The Importance of Representation in YA Literature" (2016)
* "My Journey as a Writer" (2017)
* "What It's Like to Write a Book with Your Best Friend" (2018)
* "The Power of YA Literature" (2019)