Fablehaven (Fablehaven, / Brandon Mull "When Kendra and Seth go to stay at their grandparents' estate, they discover that it is a sanctuary for magical creatures and that a battle between good and evil is looming.
The Demigod Files (Percy Jackson and the Olympians Series)
I am really sad that Percy isn't on the cover. I mean I know how Rick has said that Percy has been on most of the other covers, but still! This is the LAST BOOK! OF THE PERCY JACKSON SERIES! I just feel like he should be on the cover.