The first books my dd, now 5, enjoyed were the Magic Treehouse books.

She had the ability to read them at the age of 3.

However, she still much preferred to have us read them to her. She said there were too many words on the page and her eyes got tired.

Honestly, it took until recently for her to want to pick up and read a lengthier chapter book although she's been able to read at that level for quite some time.

I think her eyes had to catch up with her brain.

Oh, and she also loved the Daisy Meadows Fairy Books. There are dozens of them. But she's a self-described "Friend of the fairies" ... so it was a natural fit.

Not sure if that helps.