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.
Paperback, 688 pages
Published on November 1, 2016 by Aladdin
ISBN-10: 1481432303
ISBN-13: 9781481432306
35 Book Reviews
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  • 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
              • rose05775
                rose05775Friday, April 1, 2016 at 4:08 pm55 stars
                OMG GUYS THE FIFTH BOOK IS COMING OUT!!!! #im the biggest fan EVER!!
                • princessskylar
                  princessskylarWednesday, March 9, 2016 at 12:24 pm55 stars
                  So good! It's really a cliffhanger. I have it in my nook and it is the first book I bought and GREAT!
                  • Elover05Friday, March 4, 2016 at 8:31 pm
                    This book is amazing. i could read it 100 times and never get board. If you want a awesome book this is what you are looking for.
                    • 00016697
                      00016697Wednesday, March 2, 2016 at 9:32 am
                      I LOVE THIS BOOK!!! It is the best book ever. I suggest you read all 3 books first before reading this one. This book goes more into detail about the mysterious Black Swan. Sophie is in danger again. Will she survive? Who will betray her? Read this book for more details.