There are many projects – do a search for your local city or state with “books for prisoners” to support one near you:
Wisconsin Books To Prisoners.
New York City Books Through Bars.
Seattle-based Books To Prisoners.
Prison Book Program, for US, Canada, and England.
Prison Book Project.
Prison Book Program, Quincy, MA.
Open Books & the Prison Book Project, has bookstore in Pensacola, FL.
Inside Books Project, Austin, TX.

Prison Legal News “is a project of the Human Rights Defense Center, is an independent 72-page monthly magazine that provides cutting edge review and analysis of prisoners’ rights, court rulings and news concerning criminal justice-related issues.”

Fair Shake Reentry Resource Center: Free books program

organizations and articles
Texas Center for Justice & Equity
Reentry Programs in New York
California Reentry Institute
Florida: Programs for Ex-Offenders
Project 180 Reentry
Top Prisoner Reentry Programs That Turn Exit Into A New, Meaningful Entry
Can Felons Get Pell Grants to Go to College?
Unlocking Educational Opportunities: Pell Grants for Felons

“What an astonishing thing a book is… one glance at it and you’re inside the mind of another person, maybe somebody dead for thousands of years. Across the millennia, an author is speaking clearly & silently inside your head, directly to you.

Writing is perhaps the greatest of human inventions, binding together people who never knew each other, citizens of distant epochs. Books break the shackles of time. A book is proof that humans are capable of working magic.”
– Carl Sagan

Resources & Other BTB projects
Wrongful Convictions
Mission Statement and How To Donate
Voices Behind Bars
About Books Through Bars