Starfall has got 2 more sections for early readers:

1) It's fun to read, with interactive stories that let kids get more confortable with their reading skills.

2) I am reading, with several options (again, graded so start at the beginning) that make the reading a real adventure!

Super reading site. Go to "Oxford Owl for Home", "Browse e-books". Once there, you need to filter by Oxford level, beginning at Level 3. You can find it here.