When Kendra and Seth go to stay at their grandparents' estate, they discover that it is a sanctuary for magical creatures and that a battle between good and evil is looming.

Danger lurks everywhere.
Strange things are afoot at Fablehaven. Someone or something has released a plague that transforms beings of light into creatures of darkness. Seth discovers the problem in its infancy, but as the infectious disease spreads, it becomes clear that the preserve cannot hold out for long.
In dire need of help, the Sorensons question where to turn. The Sphinx has always given sound advice—but is he a traitor?...

All is not as it seems to be.
Two hidden artifacts have been found. Three more remain unrecovered. More preserves face destruction as the Society of the Evening Star relentlessly pursues new talismans. Reading in Patton's Journal of Secrets, Kendra learns the location of the key to a vault housing one of the artifacts. In order to retrieve it, the Knights of the Dawn must enter a death trap—a dragon sanctuary called Wyrmroost. The...

Fourteen-year-old Jason Walker is transported to a strange world called Lyrian, where he joins Rachel, who was also drawn there from our world, along with a few rebels, to piece together the Word that can destroy the malicious wizard emperor, Maldor.

When Kendra and Seth return to Fablehaven, they discover that Grandpa Sorenson has asked three specialists to protect the property from the Society of the Evening Star, a group determined to steal an artifact of great power from the preserve.

Kendra, Seth, and the Knights of the Dawn race against time and face dangers as they try to stop the leader of the Society of the Evening Star from possessing the final artifact needed to release evil from the great demon prison.

"Very strange things are afoot at Fablehaven. Someone or something has released a plague that transforms beings of light into creatures of darkness. Seth discovers the problem early, but as the infectious disease spreads, it becomes clear that the preserve cannot hold out for long. In dire need of help, the Sorensons question where to turn. The Sphinx has always given sound advice -- but is he a traitor? Inside the Quiet Box, Vanessa might have...