Thanks for the great suggestions. I already requested some books from this thread.

DS8 is an avid fantasy reader. Here's the list of books he's read this school year. Sorry, can't give any reviews since I gave up keeping up reading with him.

Edge Chronicles
The Stoneheart Trilogy
Dragons in Our Midst
Dragon Keepers Chronicle
The Secrets of the Immortal Nicholas Flamel series
Percy Jackson and the Olympians
Guardians of Ga'hoole
The Mysterious Benedict Society
Trouble at Timpetill

The Roman Mysteries

These books are between 4th to 7th grade reading level.