Now available in digital form is 2015’s free May Day book, The Prison Dictionary. It was written by people incarcerated at ERDCC in Bonne Terre, Missouri. From the Introduction:

The question remains: Why a “prison dictionary”? Put simply, we feel that the uncommon grouping of people of various ages, ethnicities, and backgrounds within the prison has created a unique and colorful linguistic culture worthy of being recorded.

Download the book here.