Oh-- GoodReads has a list of books on the Eugenics Movement and it's relationship to racism, nazi Germany, America, and Europe. Here are some of the titles on the list:

Better for All the World: The Secret History of Forced Sterilization and America's Quest for Racial Purity by Harry Bruinius

In Reckless Hands: Skinner v. Oklahoma and the Near-Triumph of American Eugenics

by Victoria F. Nourse

Forgotten Crimes: The Holocaust and People with Disabilities by Suzanne E. Evans

The Nazi Connection: Eugenics, American Racism, and German National Socialism

by Stefan Kühl