Karl Marx 
Contribution to the Critique of Political Economy [PDF ebook] 

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. I omit a general introduction which I had prepared, as on second thought any anticipation of results that are still to be proven, seemed to me objectionable, and the reader who wishes to follow me at all, must make up his mind to pass from the special to the general. On the other hand, some remarks as to the course of my own politico-economic studies may be in place here.