Here are some books I recommended on the fb page. Let’s use this thread to recommend books! I’ll make another one for articles.
The Activity of Being: An Essay on Aristotle’s Ontology, by Aryeh Kosman http://www.hup.harvard.edu/catalog.php?isbn=9780674072862
Alienation: Marx’s Conception of Man in Capitalist Society, by Bertell Ollman http://www.cambridge.org/us/academic/subjects/philosophy/political-philosophy/alienation-marxs-conception-man-capitalist-society-2nd-edition
Essentialism in the Thought of Karl Marx, by Scott Meikle, esp. ch. 7; Open Court, 1985. This is a fantastic book. Everyone should be required to read it.