Alcatraz series by Brandon Sanderson

It was the best book I ever read! I loved it, both of them!
~Jana Robinson, age 12

Alcatraz vs. The Evil Librarians Description:  

On his 13th birthday, foster child Alcatraz Smedry receives a bag of sand which is immediately stolen by the evil Librarians who are trying to take over the world, & Alcatraz is introduced to his grandfather & his own special talent, & told that he must use it to save civilization.

Alcatraz vs. The Scrivener’s Bones Description:  

13-year-old Alcatraz Smedry & his companions seek Al's father & grandfather in the Great Library of Alexandria, where they face undead, soul-stealing wraiths called the Curators of Alexandria, & one of the Scrivener's Bones, a part-human, part-machine mercenary.