The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Library works by Friedrich Engels (19 members)
- Library works by Gabriel Rockhill (3 members)
- Library works by George Jackson (2 members)
- Library works by Georges Politzer (2 members)
- Library works by Georgi Dimitrov (1 member)
- Library works by Georgi Plekhanov (2 members)
- Library works by Grover Furr (3 members)
- Library works by Gus Hall (1 member)
- Library works by Harry Haywood (2 members)
- Library works by Ho Chi Minh (4 members)
- Library works by Ilan Pappe (2 members)
- Library works by James Connolly (2 members)
- Library works by Jones Manoel (1 member)
- Library works by Joseph Stalin (18 members)
- Library works by Karl Marx (27 members)
- Library works by Kim Il-Sung (0 members)
- Library works by Kim Il-sung (1 member)
- Library works by Kim Il Sung (6 members)
- Library works by Kim Jong-Il (1 member)
- Library works by Kim Jong-Un (0 members)
- Library works by Kim Jong-un (2 members)
- Library works by Kim Jong Il (5 members)
- Library works by Kim Jong Un (2 members)
- Library works by Kwame Nkrumah (3 members)
- Library works by Lenin (1 member)
- Library works by Leslie Feinberg (3 members)
- Library works by Liu Shaoqi (2 members)
- Library works by Louis Althusser (1 member)
- Library works by Ludo Martens (1 member)
- Library works by Mao Zedong (22 members)
- Library works by Martin Luther King Jr. (2 members)
- Library works by Marx (0 members)
- Library works by Maxim Gorky (2 members)
- Library works by Michael Parenti (30 members)
- Library works by Moissaye Joseph Olgin (1 member)
- Library works by Muammar Gaddafi (3 members)
- Library works by Nia Frome (9 members)
- Library works by Nick Estes (2 members)
- Library works by Nicolo Machiavelli (1 member)
- Library works by Phil Ochs (18 members)
- Library works by Progress Publishers (1 member)
- Library works by Richard Levins (1 member)
- Library works by Richard Lewontin (1 member)
- Library works by Rosa Luxemburg (2 members)
- Library works by Sam Marcy (2 members)
- Library works by Samir Amin (1 member)
- Library works by Stalin (0 members)
- Library works by Sun Tzu (1 member)
- Library works by Sven-Eric Holmström (1 member)
- Library works by Thomas Paine (1 member)