These are a few books you may want to consider regarding the death penalty and racial justice:
The Sun Does Shine, by Anthony Ray Hinton
The Warmth of Other Suns, by Isabel Wilkerson
Slavery By Another Name, by Douglas A. Blackmon
Executing Grace, by Shane Claiborne
Strength to Love, by Rev. Dr. Martin Luther King, Jr.
The Half Has Never Been Told, by Edward E. Baptist
The Cross and the Lynching Tree, by James H. Cone
On the Courthouse Lawn, by Sherrilyn A. Ifill
River of Fire, by Sister Helen Prejean
Dead Man Walking, by Sister Helen Prejean
Roadmap to Reconciliation, by Brenda Salter McNeil
The Heart of Racial Justice, by Brenda Salter McNeil
The New Jim Crow, by Michelle Alexander
Just Mercy, by Bryan Stevenson