I found Heritage History, another great online book site with all kinds of old children's history books. It works a lot like The Baldwin Project; in fact a link to "Baldwin" appears in books that are on both sites. The Heritage History collection is not as extensive as Baldwin and is more focused on history in a broad sense to include legends and fiction. I especially like that it has more Catholic offerings than Baldwin, making the two great Christian companion sites.
For example History of the Catholic Church by Rev. James McCaffrey, complete with an Imprimi Potest, is available. The site also has quotes at the top of the page, several of which are from G.K. Chesterton (though none of his works appear on the site, probably because they are readily available elsewhere on the Internet.)
I've added the link to my Book Sites section. So much to read and so little time!