The Alchemyst series by Michael Scott. It's about Nicholas Flamel, who is briefly mentioned by Dumbledore in the first HP book. Flamel is a 500+ year old wizard. I'm still only on the first book, but it is promising.
Inheritance Cycle, Skulduggery Pleasant Series, Emily the Strange, The Circle Series, and Maximum Ride. If you like animals I would also recommend reading the Guardians of Ga' Hoole series and a spin off of that series–Wolves of the Beyond.