People should read Value Price and Profit because Marx proved that inflation is just companies raising prices, thoroughly debunks all the lies about causes of inflation that economists have been using to protect profits since before even his time.
All solid suggestions.
Wrt critique of the Gotha programme, it’s interesting to me that Marx was such a critic of Lassalle, so much so that Engels actually apologized for Marx’s harsh criticisms of the social democrat. Marx had called Lassalle a would be petty dictator or something like that. Except he was right, Lassalle was secretly plotting with von Bismarck on a plan to unify Germany under a bourgeois led social democracy, which von Bismarck could later seize absolute control over. Marx didn’t know about this conspiracy, he just reasoned it out.