Ruth Kinna & Saku Pinta 
Libertarian Socialism [PDF ebook] 
Politics in Black and Red

The history of anarchist-Marxist relations is usually told as a history of factionalism and division. These essays, based on original research and written especially for this collection, reveal some of the enduring sores in the revolutionary socialist movement in order to explore the important, too often neglected left-libertarian currents that have thrived in revolutionary socialist movements.