Syndicalism
by Earl C. Ford and William Z. Foster
Publication date: January 1990
Paperback: $9.00
“In your hands you hold a little piece of dynamite, an explosive political pamphlet with a good deal of significance for the history of labor and radicalism in the United States. Syndicalism, first published in 1912, offers probably the most developed theory of pure syndicalism produced in the United States”
— from the introduction by James R Barrett
The authors were, of course, leading IWW militants, so you know this is good.