Oh well in that case no wonder, to me I think private tuition is the way to go, but I learned all my history and economics looking through stuff on the internet, there's tons of resources if you know where to look, I've posted stuff up myself. I don't know what your teacher had planned giving you a book like that but making the legalisation and criminalisation of certain goods in an economy always drastically affects the price, since there are a hell of a lot of drugs either highly restricted or made illegal pharmaceutical companies make millions off essentially state sponsored trade.