Readers (Elementary)
Free to read here, from Project Gutenberg.
The Louisa Alcott Reader: a Supplementary Reader for the Fourth Year of School
A primary reader
Third Reader: The Alexandra Readers
Parker's Second Reader
A First Reader
Footsteps on the Road to Learning; Or, The Alphabet in Rhyme
The Doers
Fanciful tales
A Little Present for a Good Child
The Summers readers: second reader