My daughter is the same age. Right now she is reading through the Sisters Grimm series (there are 9 of those). She is also reading through the Harry Potter series. She reads a lot. I keep trying to get her to start Lord of the Rings, but to no avail thus far.
It’s not the same genre, but she also reads a lot of Ignatius Press’ Vision series of saints books. There are 30 of those. We tend to pick them up whenever we find them cheap on Discover Books. We have probably half of them by now.