Secrets of the Dragon Sanctuary

Two of the five artifacts that open a great demon prison are already found. Three are still missing, and the Society of the Evening Star keeps hunting for new talismans, putting more preserves at risk of destruction.

Kendra reads Patton's Journal of Secrets and learns where to find the key to a vault that holds one of the artifacts. Getting it means sending the Knights of the Dawn into Wyrmroost, a dragon sanctuary that works as a death trap.

The mission has a further obstacle. It cannot go ahead unless the group steals a sacred object that the centaurs guard with great zeal. Seth, meanwhile, is missing, and no one seems to know where he has gone.

This is the fourth book in the Fablehaven fantasy series, so it carries on from the three before it. The tension comes from a contest over the five keys to the demon prison. Open questions drive it: whether the Knights survive Wyrmroost, who can stop the Sphinx, and whether Vanessa can be trusted to help. A shocking secret waits along the way.