Bauer, Shane. 2018. Time article (very, very good and eye opening), but he also has a book.
Berger 2018. Journalistic article with very good commentary and links. Points out inter alia that Michelle Alexander paints in very broad strokes. I need to know / learn / read more.
Chase 2019.
Foucault, M. Discipline and Punish. This is where the concept carceral continuum comes from.
Gilmore, Ruth Wilson, 2018. Golden Gulag. UC Press.
Wikipedia on the carceral archipelago. Good explanations, bibliography, although it is “just Wikipedia.”

Photographs and news
Camp A in 1901 (originally the slave quarters)
Rubin et al., ProPublica report on COVID at Angola, 24 June 2020. Detailed information on officials, corruption, more.