Interest LevelReading LevelReading A-ZATOSWord Count
Grades 4 - 8Grade 6n/a5.6164556
Sophie and her friends face battles unlike anything they’ve seen before in this thrilling sixth book of the New York Times and USA TODAY bestselling Keeper of the Lost Cities series.

Sophie Foster is struggling. Grieving. Scrambling. But she knows one thing: she will not be defeated.

The Neverseen have had their victories—but the battle is far from over. It’s time to change tactics. Make sacrifices. Reexamine everything. Maybe even time for Sophie to trust her enemies.

All paths lead to Nightfall—an ominous door to an even more ominous place—and Sophie and her friends strike a dangerous bargain to get there. But nothing can prepare them for what they discover. The problems they’re facing stretch deep into their history. And with time running out, and mistakes catching up with them, Sophie and her allies must join forces in ways they never have before.

In this spectacular sixth book in the New York Times and USA TODAY bestselling Keeper of the Lost Cities series, Sophie must uncover the truth about the Lost Cities’ insidious past, before it repeats itself and changes reality.
Hardcover, 576 pages
Published on November 7, 2017 by Aladdin
ISBN-10: 1481497405
ISBN-13: 9781481497404
25 Book Reviews
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  • bsc
    bscThursday, August 13, 2020 at 7:45 am55 stars
    Another terrific KOTLC book. The Neverseen have Sophie's parents and are holding them hostage. She and her friends plan to free them. but when they get there they find out some crazy things. In the 6th book, Shannon Messenger does it once again, by making you root for the characters till the very end.
    • 4usa
      4usaTuesday, August 4, 2020 at 9:50 am55 stars
      This is the sixth book in the greatest series ever! It's hard to give a detailed description for these books because of the depth, adventure, and incredible story Shannon Messenger can somehow fit into them but they are all incredible and I hope that you enjoy them as much as I do! #TeamSoKeefe
      • howls
        howlsFriday, July 31, 2020 at 4:44 pm
        A little bit Alice in wonderland and hit Lord of the rings and Harry potter and all fun
        • toodorky
          toodorkySunday, May 17, 2020 at 2:12 pm55 stars
          I loved this book so much! I think that this was my favorite book in the series because Sophie is challenged to listen to the enemy this time. In order to save her family, she must do everything that Lady Gisela, or Keefe's mom asks. This makes it hard for Sophie to focus on other important things. Will Sophie manage to save her family, or will Gisela finally have what it takes to control her forever?
          • blossomreader
            blossomreaderSunday, May 10, 2020 at 8:43 am55 stars
            Sophie just realized that her human parents are what the Neverseen are after, and now Sophie, along with her friends, are going to have to save them.All clues and tips lead to Nightfall, a door that leads to something greater than all of their imaginations combined. Sophie might have to trust the enemy to get back her family. She has her sister, but that's not enough. Sophie has to figure out secrets of the past and face a shocking reality in this 6th book.Atlantis is in trouble, ther's a human on their hands that needs protection, a family to save, and more than one secret that could could change their plans. I liked this book, and I think you will too.
            • nac
              nacWednesday, May 6, 2020 at 1:29 pm55 stars
              This time the Neverseen have gone to far. Kidnapping Sophie's human parents has left Sophie feeling horrible. How could this happen? The only clue to where her parents have gone is a mysterious facility called Nightfall. And the only way to get there is to make a deal with an ex-member of the Neverseen to deliver a message to the ogre king (who hates Sophie and her friends). But no worries, the contents of the message can't be that bad, right? Wrong.
              • kotlcgirl
                kotlcgirlTuesday, April 7, 2020 at 9:50 am55 stars
                Sophie Foster's human parents are missing! Every time Sophie and her friends discover a clue, it leads to Nightfall, a door that leads to an ominous place that can only be accessed with blood... The Black Swan made it clear: they are the champions of game-changing secrets, which is good, because the Neverseen are ready to do anything, and Sophie needs to start trusting people that might be enemies to be able to defeat the rebellion that could destroy the Lost Cities...
                • kotlcgirl
                  kotlcgirlWednesday, March 25, 2020 at 11:03 am55 stars
                  BEST BOOK EVER
                  • K23A8Thursday, January 2, 2020 at 7:44 am
                    Great book! Sokeefe forever! I Love KEEFE!!! He's amazing, and this book is amazing and this WHOLE saga is amazing!! Keep reading!
                    • Sorting hatTuesday, August 13, 2019 at 1:05 pm
                      I LOVE THESE BOOKS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!