Robert F. Kennedy Jr. is gaining traction as a fringe challenger to U.S. President Joe Biden, despite his controversial comparison of COVID-19 vaccine mandates to Nazi medical experimentation on Jews in concentration camps.

"The Eternal Nazi" by Nicholas Kulish and Souad Mekhennet is a compelling account of the hunt for Nazi doctor Aribert Heim, infamous for his sadistic medical experiments at Mauthausen concentration camp.