The academic term for studying disability in society and history is (rather nicely plain-spoken for academia) "disability studies," and it's a really big hot field. I've read some stuff but mostly articles and chapters, and just related to castration. So it's teach a man to fish time! Here is a custom search in Worldcat for books cataloged under this subject available in ebook. You'll notice that this is very academic stuff though... The other relevant subject heading is "People with disabilities -- History", this subject heading seems to have some more popular-level stuff so try each subject heading depending on what you're into. But almost every major academic press publishes in some sort of ebook format these days, and this is a pretty young field, so I doubt you'll find much on the subject you can't get in ebook! There's also several academic journals publishing on this topic. The oldest and biggest one is open access, and looks pretty screen-reader friendly (as one would hope!), on the off chance that's why you need ebooks. :)