Continuing with the Das Kapital reading series!
Reading guides/secondary literature I've used:
Harvey's "Companion to Marx's Capital"
Stephen Shapiro's "How to Read Marx's Capital"
Heinrich "An Introduction to the Three Volumes of Capital
Fredric Jameson's "Representing Capital: A Reading of Volume One"
http://la.utexas.edu/users/hcleaver/357k/357ksg.html
All of my links at livagar.com
Explaining Marx's Capital Volume 1: Chapters 4-6