McKenzie Wark’s latest dip into Debordiana, The Spectacle of Disintegration, focuses on Guy Debord’s comrades as well as on the Situationists’ bibulous prince. He gives Sit’-for-a-season T.J. Clark the most ink, though Clark’s early and late works of Art History are too rich for any bite-sized summary. But other, lesser figures in Debord’s orbit are ripe for Wark’s approach.