Interest LevelReading LevelReading A-ZATOSWord Count
Grades 4 - 8Grades 3 - 6n/a5.3135683
Sophie battles the rebels—and recovers dark memories from her past—in this jaw-dropping fourth book in the bestselling Keeper of the Lost Cities series.

Sophie Foster is on the run—but at least she's not alone.

Her closest friends from the Lost Cities have gone with her to join the Black Swan. They still have doubts about the shadowy organization, but the only way to find answers is to start working with them. And as they settle into their new lives, they uncover secrets bigger than anything they’d imagined.

But their enemies are far from done, and unleash a terrifying plague that threatens the safety of an entire species. Sophie and her friends fight with everything they have—with new allies joining them—but every choice has consequences. And trusting the wrong person could prove deadly.

In this game-changing fourth book in the Keeper of the Lost Cities series, Sophie must question everything to find a truth that will either save her world—or shatter it.
Hardcover, 688 pages
Published on November 3, 2015 by Aladdin
ISBN-10: 148143229X
ISBN-13: 9781481432290
19 Book Reviews
Add a Rating
  • kgautam
    kgautamFriday, May 31, 2019 at 10:27 am44 stars
    sophie and her friends are ready to join the black swan, but that adds a lot of hardship and responsibility to the work that they do. really enjoyed this novel, and can't wait to read the next one.
    • glitterclaws
      glitterclawsTuesday, May 14, 2019 at 8:19 am55 stars
      loved it loved it loved it you should read them all. there my fav
      • lains24
        lains24Wednesday, October 24, 2018 at 3:23 am55 stars
        • McFarlandNavyMonday, May 21, 2018 at 9:55 am
          All of Shannon Messengers books are amazing including on her other series Skyfall.She is an awesome author and I can’t wait for her 7 book Flashback to come out.❤️😊
          • emmaplays2546
            emmaplays2546Wednesday, March 1, 2017 at 9:18 am55 stars
            This book was so intense, and poor Callie. She sacrificed herself to save them. R.I.P Callie. :(
            • cutieswirl
              cutieswirlSaturday, December 3, 2016 at 7:03 am55 stars
              Sophie Foster is saving the Elvin world from danger. She figures out more about her past and maybe some things about her future.
              • AnonymousWednesday, November 2, 2016 at 1:48 pm
                I hear the next book is coming out soon. Can't wait! It's called Lodestar
                • lopsideup
                  lopsideupWednesday, January 17, 2018 at 12:22 pm55 stars
                  It's out! Read it, and it is SO good!!!!!
                • mortalnstrument
                  mortalnstrumentTuesday, November 1, 2016 at 6:13 am55 stars
                  LOVED the adventure and the last chapter. you have to read!!!
                  • midnightluna
                    midnightlunaMonday, June 6, 2016 at 12:42 pm55 stars
                    Sequel to Everblaze! Jokes and cliffhangers unite as our brave group of friends journey to find the Black Swan, learn new and terrifying things, and make new friends! Be prepared for a huge cliffhanger though!! Grab a box of tissues and get ready for the Journey of a life time!!
                    • rose05775
                      rose05775Sunday, May 22, 2016 at 6:27 am55 stars
                      Like this comment if ur getting the book that comes after this 1!!!! :D