Ken Strutin – law librarian, criminal defense attorney, and well-known writer and speaker, documents the preeminence of the United States as the world leader in incarceration. He states that incarceration is when a person loses their freedom pending trial or by serving a sentence – and mass incarceration is when millions of people are imprisoned and kept there based on a generation of tough on crime policies. The number of persons behind bars, which is higher in the United States than anywhere in the world, creates a ripple effect throughout the criminal justice system and society at large. This fact has inspired intense study of this punishment by many academic disciplines, public interest institutions and government agencies. His article focuses on selected recent and notable publications from these sources along with a list of current awareness sites.