The second Radical Thinkers question relates to Althusser and Balibar’s landmark of French thought: Reading Capital, which is no less than an attempt to topple the edifice of Western Marxism and rebuild it from the original foundations.
Establishing a rigorous programme of “symptomatic reading” that cuts through the silences and lacunae of Capital to reveal its philosophical core, Louis Althusser interprets Marx’s structural analysis of production as a revolutionary break — the basis of a completely new science. Building on a series of Althusser’s conceptual innovations that includes “overdetermination” and “social formation,” Étienne Balibar explores the historical and structural facets of production as Marx understood them, scrutinizing many of the most fundamental points in Capital, as though for the first time. 
The second question in our Radical Thinkers giveaway competition is:
Jacques Rancière famously broke with the thought of Louis Althusser in which essay?
UPDATE:
Entry to the competition for Radical Thinkers question 2 is now closed! The answer is:
La Leçon d’Althusser