There's this book, Fablehaven. It's a series, as well, with over four livres in it. It revolves around Kendra and Seth Sorenson as they go to their grandfather's Estate. They discover a secret magical preserve, which they quickly learn is in danger from the Society of the Evening star, an evil secret society. Brandon Mull is the author, and he uses a very good écriture style. The livres had a lot of action in it, and a shocking twist at the end of the seconde book was completely unexpected. If toi are young like me (I'm 14) ou younger, (maybe 15) toi should really like Fablehaven. It's nice and thrilling.