This article assess two important recent books on Marx's political economy and argues that, despite many virtues, there are some crucial limitations in their approach to Marx's political economy. Ben Fine's and Alfredo Saad-Filho's Marx's 'Capital' and The Value of Marx by Saad-Filho place too much explanatory weight on the composition of capital, giving too little attention to Marx's analysis of money, and to the processes of circulation and realisation.

A further critique of Fine and Saad-Filho's reading of Marxist political economy: it neglects the monetary dimension of Marx's analysis; it focuses too much on production, and on the organic composition of capital, treated in isolation from the overall circuit of capital. An alternative theorisation is proposed, stressing what will now be called emergence patterns in Marx's value theory, and giving due weight to circulation, realisation, competition and capital allocation.

I survey some important semantical and axiomatic theories of self-referential truth. Kripke's fixed-point theory, the revision theory of truth and appraoches involving fuzzy logic are the main examples of semantical theories. I look at axiomatic theories devised by Cantini, Feferman, Freidman and Sheard. Finally some applications of the theory of self-referential truth are considered.

Fine and Saad-Filho are wrong to insist that an abstract category of production should be the starting point of Marxist value-theory in logical, temporal and causal terms. Marx, in Capital, begins with a repertoire of simpler categories and slowly constructs the complex category of capitalist production. It is vital that exploitation should be seen as one phase of a process of capital-in-motion, and due weight given to money, competition and realisation.