The Dispossessed by Ursula K Le Guin

Goliath's Curse by Luke Kemp

Not directly about anarchism, but instead about anthropology. I find that a lot of discussions about anarchism end up going awry as soon as people start injecting some common myths about anthropology into the mix. False assumptions about history and human nature will lead to ineffective conclusions about how to deal with it.

This list here is stuff I've read and would recommend to others:

No Gods No Masters by Daniel Guerin; Demanding the Impossible by Peter Marshall; The ABC of The Revolutionary Anarchist by Nestor Makhno; Blessed Is the Flame by Serafinski; "Some Notes on Insurrectionary Anarchism" by Sasha K; "On Synthesis" and "Synthesis (Anarchist)" by Voline; "The Anarchist Synthesis" by Faure; "Anarchism" by Voltairine de Cleyre; "About the Platform" by Errico Malatesta and Nestor Makhno; "At the Cafe" by Errico Malatesta; "Armed Joy" by Alfredo M. Bonanno; For All the People by Curl (if you're interested in Cooperative/Communal history in the U.S.).

This list is stuff I'm waiting to read but looked good enough to try:

Wobblies and Zapatistas by Lynd and Grubacic; Anarchy and Insurrection and Insurrectionalist Anarchism by Alfredo M. Bonanno; Anarchy Works by Peter Gelderloos; Mutual Aid by Peter Kropotkin; Now and After by Alexander Berkman; Markets Not Capitalism by Chartier and Johnson; Studies in Mutualist Political Economy by Kevin Carson; Walkaway by Cory Doctorow; and The Selected Works of Voltairine de Cleyre by Alexander Berkman.