Across the U.S., various organizations work to ensure that people who are incarcerated have access to literature. These include Books to Prisoners, which originated with a bookstore, and Books Not Bars, a publisher’s program.
The Friends of the Library group that I belong to runs a book sale twice a month out of its “Bookstore” in the library. A member of the County Jail staff comes in a couple of times a year and gets books for the its library. It’s a win-win; we get room on our overflowing shelves and the incarcerated are exposed to the joy of reading.