When the Grace children go to stay at their great-aunt Lucinda's worn Victorian house, they discover a field guide to fairies and other creatures, and begin to have some unusual experiences.

Nick,Julie, Laurie, and their friends try to prevent a hydra from destroying Florida.

When Mallory and Jared attempt to rescue Simon from goblins, they use a magical stone that enables them to see things that are normally invisible.

After Mallory is kidnapped at her fencing meet, Jared and Simon search for her near an old quarry and find themselves amidst dwarves and goblins.

When his father remarries and moves his new wife and daughter into the soon-to-be completed Mangrove Hollow, eleven-year-old Nicholas Vargas finds an ally in his new stepsister when a little nixie with a huge problem comes to him for help.