[Marxism] Best bios of Marx and Lenin?

[Patrick Bond]

Does anyone know of a 1921 biography of KM by a German sociologist, 
Ferdinand Toennies (my great grandfather)? I'd once seen an english 
translation of this work, but can't recall its quality and biases.

Einde O'Callaghan wrote:
> I liked Wheen's book, but I still think some of the classical 
> biographies are well worth reading, particularly Mehring's - although 
> is take on Lassalle is completely wrong.
>