Reading 'Pictures of the Socialistic Future' by Eugen Richter, originally published in 1893. Imagines a future Germany under socialism and extrapolates its conditions and actions based on the proclaimed policies of the socialists of his day.
Richter was a libertarian in the "Manchester liberal" tradition, in a Germany where totalitarian socialism was rapidly gaining intellectual traction. He gets quite a lot of things eerily right -- his socialist dystopia looks just like East Germany around 1960, complete with border guards shooting anybody trying to get away.
Read it for free here.
"Made me hate socialism all over again" -- Jeffrey Tucker, of the Ludwig von Mises Institute.