Death Penalty Information http://deathpenaltyinfo.msu.edu/
An interactive exploration of capital punishment, including arguments for and against, issues of ethics and justice surrounding the death penalty, and maps showing state-by-state data.
Hangmans Knot http://www.hangmansknot.com/
Book by Eliza Steelwater on a history of capital punishment practices in America. Contains news, a biography, and reviews.