Internet
Chicago Anarchists on Trial (Library of Congress: "American Memory" Project)
(Site includes large collection of materials held by the Chicago Historical Society. Included in the collection is the complete trial transcript, trial exhibits, maps, a brief chronology of events, and a brief account of the Haymarket story.)
Homicide in Chicago 1870-1930 (by Leigh Bienen, Northwestern University School of Law)
(Site includes extensive collection of newspaper clippings, historical photographs, and articles.)
Non-Fiction Books
The Haymarket Tragedy
by Paul Avrich (Princeton Univ. Press, 1984)
Death in the Haymarket : A Story of Chicago, the First Labor Movement, and the Bombing That Divided Gilded Age America
by James Green (Pantheon, 2006).
Haymarket Scrapbook (Paperback)
by David R. Roediger, Franklin Rosemont
(Charles Kerr Publishers, 1986)
Anthology with images, speeches, cartoons, and other materials.
Historical Novel
Haymarket (Paperback)
by Martin Duberman (Seven Stories Press, 2005)
Novel set against the Haymarket tragedy.