My daughter and I listened to the Septimus Heap series by Angie Sage. There are seven books in the series and being a Harry Potter fan, she loved Septimus Heap. The magical world created is wonderful and has some amazing characters.
I've read the follow up series Tod Hunter Moon -- but my daughter didn't care for it. I liked it because some of the characters in the original Septimus series make an appearance in this, but there are a whole group of new characters and worlds to explore.
We also loved the Forbidden Library series by Django Wexler. We are anxiously waiting for the next in the series to be written. This is also a magical world and the main character is a young girl named Alice who has to learn how to use her magical abilities