"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 information that could lead to a cure, but can she be trusted? Meanwhile, Kendra and members of the Knights of the Dawn must journey to a distant preserve and retrieve another hidden artifact."--Cover.

Includes reading guide (p. 477-479). Includes excerpt from: Secrets of the dragon sanctuary.

Nipsies -- Reunion -- Sharing discoveries -- New knights -- First assignment -- Plague -- Lost mesa -- Shadowman -- Pathways -- Shadow wounds -- Old pueblo -- Obstacles -- Secret admirer -- Homecoming -- Brownie Sunday -- Refuge -- Preparations -- Old manor -- Duel -- History -- Fairykind -- Light -- Darkness -- Good-byes.