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 Book 8.5, Unlocked, which will release on November 17, 2020. 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 in book 8.5
  • New art will release with the coming of this book.
  • Most 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.
  • Book 8.5 will come out in November 2020, and it will be a special story picking up right after Legacy left off. After it, the series will continue to book 9
  • Since Book 8.5: Unlocked will be coming out this year, book 9 will come out in fall 2021


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