letter sorting by Appalachian Prison Book ProjectSeptember 22, 2017August 22, 2019 Leave a comment On Sept. 22, 2017, APBP sorted through the letters we have received over the past decade! This is step-one in our plan to create a digital archives. Share this:TwitterFacebookLike this:Like Loading... Written by Appalachian Prison Book Project The Appalachian Prison Book Project (APBP) is a nonprofit organization based in Morgantown, WV. APBP sends free books to people imprisoned in six states in the Appalachian region: West Virginia, Virginia, Maryland, Ohio, Kentucky, and Tennessee.