There's a library that circulates gently used books among urban street dwellers. They could use books (including Books You Can Buy From Me, if anybody out there feels moved to make donations), and some of their patrons have also requested reading glasses.
If you have an old pair of reading glasses to spare, please check out streetbooks.org.
(I hate to say this, but there are some street dwellers whose medical conditions have affected the part of the brain that processes whatever we perceive as "spiritual" thoughts and experiences. Some of these people don't suffer from religious mania, but do feel attracted to religious language. So they might be particularly interested in the religious books here...although I sell books from all genres.)