My local jail removed the library a decade ago. Regular inmates only have access to tablets for media, that they must pay for. Only people kept in the SHU/on punishment, who are denied their tablets, are given physical books, and the selection is trash. Like it’s a singular cart that is rolled around. If you have a contact with someone there, I would trust them, but if your area has a non-profit that works with the jail, you could get an unbiased take by talking to that person.