Megan, I stumbled over this wonderful book review written by a former inmate... maybe it's useful :)

https://medium.com/@wjcornelius/books-for-inmates-the-untethered-soul-93d6ff63f658

Thank you for this piece! When I downsized my house, I gave away so many books, softcovers, that I'm now thinking I should have donated to the nearest prison... it never occurred to me!

Maybe you could come up with a list of books and types of books that would be particularly useful or wanted?