the alchemyst, Percy jackson and the olympians (how i got introduced to fablehaven), the sixty-eight rooms,the Heroes of olymus (following the percy jackson and the olympians series), the cabinet of wonders, the mortal instruments series (book one is city of bones), the infernal devices (first book is clockwork angel), the sister's grimm series (book one is the fairy tale detectives)
After note-all of these are in a series in exception to the sixty-eight rooms. The mortal instruments is for ages 12+, and infernal devices the same except the infernal devices takes place in 1800's britain. And Rick Riordan (writer of the Percy Jackson Series (first book is called the lightening theif) and the Olympians and the Lost Hero (series is called Heroes of Olympus) is the best writer in all existence but is equal to Brandon Mull.
I have read all of the libri in all of the series's and loved everyone!
The hunger games trilogy da suzanne Collins Percy Jackson and the olympians da Rick riordan Into the wild/out of the wild da Sarah Beth durst Cirque du freak da darren shan The guardians of time trilogy(starting with the named) da marianne curly The warrior heir da cinda Williams chima
These are just a few suggestions of fantasy libri I've enjoyed taken off the superiore, in alto of my head. I definitely suggest checking out into the wild, its full of mystical creatures and is a great book, although its not well known. Hope this helps!