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The final book in the New York Times bestselling House of Secrets series that was called "a breakneck, jam-packed roller coaster of an adventure" by J. K. Rowling. Created by Hollywood director Chris Columbus (of Harry Potter fame) and bestselling author Ned Vizzini (It's Kind of a Funny Story), with the acclaimed author of the Codename Zero series and the Fourth Stall saga, Chris Rylander.

With their last adventure just barely over, the Walker kids thought life would finally go back to normal. But things don't remain calm for long... especially when the colossus Fat Jagger turns up in San Francisco Bay -- and he's in danger!

With the police closing in, the Walkers must figure out how to save their giant friend. When a frost beast is spotted in Santa Rosa -- and more mystical creatures start appearing all over America -- it's soon clear that the characters from Denver Kristoff's works are invading the real world. It's up to Brendan, Eleanor, and Cordelia to reenter the book world one last time to keep the worlds from colliding, causing mass destruction.

They will have to track down three Worldkeepers hidden in Kristoff's books -- magical items that when used together will seal the worlds off for good. But the Walkers' first move leads them straight into the Wild West, with lethal outlaws and lawless deputies -- and that's just the beginning. They'll encounter dinosaurs, aliens, killer robots, and the Wind Witch herself -- with new friends and old -- and be faced with some of the deadliest choices they'll ever have to make. The scariest thing of all could be deciding who to trust, since everyone is hiding something...

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  • We started tracking this book on August 13, 2015.
  • This book was $9.99 when we started tracking it.
  • The price of this book has changed 129 times in the past 3,829 days.
  • The current price of this book is $7.99 last checked one hour ago.
  • This lowest price this book has been offered at in the past year is $1.99.
  • The lowest price to date was $1.99 last reached on December 27, 2025.
  • This book has been $1.99 20 times since we started tracking it.
  • The highest price to date was $9.99 last reached on January 5, 2026.
  • This book has been $9.99 9 times since we started tracking it.

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Additional Info

  • Publication Date: May 3, 2016
  • Text-to-Speech: Disabled
  • Lending: Disabled
  • Print Length: 509 Pages
  • File Size: 124 KB

We last verified the price of this book about one hour ago. At that time, the price was $7.99. This price is subject to change. The price displayed on the Amazon.com website at the time of purchase is the price you will pay for this book. Please confirm the price before making any purchases.