Various Marxist authors have focused on Marx's method of analysis and presentation (historical materialist and logically dialectical) as key factors both in understanding the range and incisiveness of Karl Marx's theoretical writing in general and Das Kapital in particular. One of the clearest and most instructive examples of this is his discussion of the value-form, which acts as a primary guide or key to understanding the logical argument as it develops throughout the volumes of Das Kapital.
Marx himself presents a simplified explanation in the Appendix to the first German edition of Das Kapital published in English translation in Capital & Class. The need for this appendix was suggested by Engels and there is an exchange of correspondence concerning its purpose and form.
Henryk Grossman focussed considerable effort in often difficult circumstances in pursuing fundamental research into Marx’s method. His studies resulted amongst others in his masterwork: The Law of Accumulation and the breakdown of the Capitalist System: Being also a theory of crises Pluto 1992.
Evald IlyenkovThe Dialectics of the Abstract and the Concrete in Marx's Capital Progress Moscow 1982
Franz Jakubowski in his Ideology and Superstructure in Historical Materialism Pluto 1990
Karl KorschThree Essays on Marxism Pluto 1971 and Marxism and Philosophy Monthly Review 1970