Brian Nam-Sonenstein, co-host of the "Beyond Prisons" podcast and publishing editor of Shadowproof, appears on "Unauthorized Disclosure" to help the show outline the issue of censorship in United States prisons and jails.   **BECOME A SUBSCRIBER at TheDissenter.org for as little as $3/month**    Censorship is not limited to banning books. Nor is it only retaliation against an incarcerated individual who wants to write a letter for publication.  He describes why free speech advocates should absolutely care and how censorship has intensified as facilities move away from physical mail.     (Note: This is a free version of this week's episode. For the full episode, subscribe to the podcast at TheDissenter.org.)