Fablehaven book series
The Fablehaven books have been listed in order of their publication so that kids can read them in chronological order. Fabenhaven book series centers on Kendra and Seth Sorenson, who are thirteen and eleven year old respectively and would travel to visit their grandparents while their parents are on a cruise.
At their grandparent’s home, they discover the magical universe of Fablehaven after which they are able to see the magical creatures that live around them. They, then embark upon an epic quest to defeat an evil witch and a demon.