The Codex of the Endangered Species Act, Volume II: The Next Fifty Years (Rowman & Littlefield; November 15, 2023), edited by legal and environmental historian and attorney Lowell E. Baier, Dr. John F. Organ, and Christopher E. Segal with a foreword by Representative Debbie Dingell (D-MI-6th) and Senator Martin Heinrich (D-NM) looks ahead to the promise of the future.