Fablehaven: Grip of the Shadow Plague

This book picks up where "Fablehaven: Rise of the Evening Star" leaves off, during the same summer of the second year at Fablehaven. During the Summer, Kendra is recruited by the Knights of the Dawn, a secret organization that opposes the society of the evening star, and for the first time, Kendra and Warren must visit another magical preserve, called Lost Mesa, that is located in the state of Arizona. They reside there, with Lieutenant Dougan Fisk, and dragon tamer Gavin Rose (whom Kendra has feelings for). Another hidden artifact must be recovered from Lost Mesa, before The Society unveils it first.

Meanwhile, Seth discovers that someone, or something, has released a plague throughout Fablehaven, that turns light creatures into dark creatures. While they resolve to stay at Fablehaven to defend it, it is clear that they can no longer protect the preserve. As light creatures can enter most places throughout the preserve, the same rules apply to their darker forms. As the plague spreads, darkened Brownies overthrow the house and trap the caretakers in Fablehaven. Seth is stuck at Fablehaven, and he, his grandparents, Tanu, and Coulter must try to solve the mystery of the plague. Seth discovers that he has gained new abilities with destroying Fablehaven's revenant. He is able to shadow-walk, hear the voices of prisoners from the dungeon that dwell underneath the main house, and speak the language of many creatures such as imps, goblins, trolls, demons, and giants. (Kendra can recharge magical artifacts, see in the dark, control fairies, glow very brightly, and talk to many magical creatures like Seth.)

Kendra and the group at Lost Mesa manage to enter the Painted Mesa, the location of the artifact, and survive, though several members of the Knights are killed in the process. Kendra then discovers that Patton Burgess had retrieved the artifact and hidden it at Fablehaven.

Seth and the other caretakers enter the original Fablehaven manor, which was abandoned after the caretaker of that time and his family were killed by a mysterious being, with Patton Burgess being the only survivor. After entering the manor, a mysterious woman made up of darkness turns everyone but Seth into shadows that are only visible to Seth and can still choose to be good. While hiding, Seth finds the Chronometer, the artifact that Patton had stolen from Lost Mesa, and accidentally brings Patton forward in time for three days. With Patton's help, Seth escapes.

After coming back Kendra learns that Warren, Grandpa, Grandma, Dale, Tanu, and Coulter have been turned into shadows by the plague. Seth, Kendra and Patton convince the remaining light creatures, who have taken refuge at the naiads' pool, to help them stop the plague. Patton tells Seth and Kendra that the woman-the cause of the plague-is a fallen hamadryad named Ephira. He says that she became mortal and went to Kurisock, another demon, to help her regain her immortality, and destroyed the old manor. Patton, Kendra and Seth recruit the light creatures to help them take down the dark ones. Lena also leaves the naiads and becomes human again in order to be with Patton. Kendra visits the Fairy Queen's shrine to get help, and the Queen creates a stone that can stop the plague, but destroys her shrine in the process. Patton helps Seth and Kendra shut down the plague and Lena dies when they shut down the plague.

After the plague is stopped Dougan comes to escort Kendra and Seth home. He also shares that the Sphinx is a traitor, confirming Vanessa's earlier suspicions.

• Official Fablehaven series site