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 release in November of 2021.[1] The previous book is Legacy, which released on November 5, 2019. It will most likely include a Short Story, as the past three books (Book 6: Nightfall, Book 7: Flashback and Book 8: Legacy) have.

What We Know

  • The cliffhanger from Legacy will be resolved before Book 9 comes out.
  • New art will release with the coming of this book.
  • Most, if not all, of the questions we have will be resolved.
  • This may be the last book of the series. If Shannon Messenger does not have room/time to finish the story, there will be a tenth book.
  • There will be something super exciting that will come out in Fall 2020: A special story picking up right after Legacy left off and will continue into book 9.


Start a Discussion Discussions about Book 9: Unknown

  • FANFICTION of Book 9: Stellarlune (Part 2)

    400 messages
    • uhh. The mysterious benedict society is good. And some books by Carl Hiaasen. 
    • wrote:uhh. The mysterious benedict society is good. And some books by Carl Hiaasen.  yes, amazing!
  • Do u think Keefe is better than Fitz?

    53 messages
    • SoKeefe- the best word in the history of Keeper and ever. Sry Fitzphie this slot is taken so is the king of the universe tile(i think keefe s...
    • Well tbh, I think Fitzphie/Sophitz died in Legacy? Flashback? Fitz literally rejected Sophie because she was unmatchable, and he didn’t want...
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