Books by the Foot. Each box contains approximately 150 books (give or take). You can also order more age/grade specific books, but it costs a bit more. There is now an advisory on their site that due to high demand, boxes may not ship for up to 5 weeks.
A list of early chapter books about boys featuring a variety of interests. The reading level is appropriate for kids who are no longer reading easy readers but do not yet read middle grade novels independently.