On May 22nd, 2018, Shannon Messenger announced that there will be a ninth book in the Keeper of the Lost Cities series. It is scheduled to be released in the fall of 2020. The previous book is Legacy, which will be released on November 5, 2019. It will most likely include a Short Story as the past two books (Book 6: Nightfall and Book 7: Flashback) and the upcoming Legacy have and will have.

Community content is available under CC-BY-SA unless otherwise noted.