A lot of anarchists wrote about state, but unlike in Marxism where Lenin's "State and Revolution" remains an unchallenged work in terms of popularity and theoretical importance to Marxism, there isn't a singular anarchist theoretical work on the state on the same level as Lenin's. This is perhaps by design. Anarchism has no central canon to enshrine an equivalent to Lenin. So if there is no anarchist equivalent of Lenin's "State and Revolution, what then is your favorite text explaining the state? What text brings the most insight in explaining hierarchy and statism?