I'm looking for a working book of Marx's Labor Theory of Value. It would be nice if the book would explain his theory with calculated examples and some exercises with solutions that one can do. Since I'm a German I could read The Capital for myself, but I find it too complicated. Any good books on this?
Check these slides, which includes a fairly introductory analysis to the LTV, including some trivial examples and calculations.
Yet, this is the best I am aware of. It is an attempt to explain the theory to "undergraduates" using a simple example. Worth reading!
Eric Fromm has written great analyses of Marx (Marx's Concept of Man). His central argument is showing that Marx was a Humanist (and his political writing derived from that point) and that he has a son of the Enlightenment. It was a fascinating read where he used a number of Marx's works that are rarely seen in English (although that shouldn't be a problem for you). Here is the link to the book.