Fablehaven: Keys to the Demon Prison, by Brandon Mull is the 5th and final book in the Fablehaven series.
Kendra and Seth’s parents have been kidnapped by the duplicitous Sphinx, head of the Society of the Evening Star. And the Sphinx now has control of most of the keys to the demon prison Zzyzx, which he wants to open. But opening the demon prison means the means the end of the world.
In this final installment of the Fablehaven series, siblings Kendra and Seth are separated throughout most of the book. Both face their own epic quests as they try to stop the opening of Zzyzx by any means possible. Along the way, they are reunited with old friends and confidants as well as new mysterious characters. Because of their past experience, neither sibling is quick to trust strangers anymore. But the side of good needs all the help they can get in this seemingly unwinnable war.
Fablehaven has continued to be one of my all-time favorite children’s fantasy series. And this final book finally reveals mysteries and questions that fans have been waiting for. I am a little disappointed that the series has ended, but am very pleased with the way Mull has wrapped up the story. Kendra and Seth have been extremely enjoyable characters. And the world of Fablehaven appeals to people of all ages. With more fantastic creatures, far off lands, and dangerous quests, Keys to the Demon Prison leads up to an action-packed final battle with a satisfying ending to an incredible series.