Online Readers for Primary Grades

I absolutely love the Baldwin Project.

http://www.mainlesson.com/author.php?author=treadwell

This is a set of readers by Harriet Taylor Treadwell from the early 1900s.

Here is the link to all of the books they offer free:
http://www.mainlesson.com/displaybooksbytitle.php

I love the Young People's Plutarch