Good versus Evil

Fablehaven, the novel, depicts the idea of good versus evil, though there are some non-traditional aspects of the theme, including Grandpa's reminder that none of the magical creatures on the Preserve are fully good. While the fairies obey Kendra's call and ultimately save the Preserve, they are powerful and selfish. They show that they are capable of being vicious. Other creatures also show the dangerous and evil aspects of their nature, but Kendra and Seth learn there are levels of evil when they face Muriel and Bahumat.

When Kendra and Seth first see the fairies, Grandpa warns them that the fairies are not the fun, happy creatures they seem to be. He does not give his grandchildren any more information, other than to warn that all of the creatures are selfish. Some of the creatures do good things, but only when it matches their...