As a teenager, John Bunn was wrongly convicted of murder. After 17 years in jail, he spent the next decade on parole and fought for his exoneration. Now, after 27 years, Bunn is exonerated. And now, he’s making it his life mission to inspire inmates to read.

Learn how Sistah Souljah’s book, The Coldest Winter Ever inspired him and how that inspiration turned into action. The action? Building libraries in prisons. Follow Bunn’s journey in the video below.

Read John Bunn’s full story on CNN.