I'd second this. It's a bit waffle-y, but the shout for starting with a Van Westendorp PSM is pretty solid. Would like to have seen a mention of Gabor-Granger as that then helps bring a secondary element of profit maximisation into the mix.

Van Westendorp is great for understanding what prices the market will accept, but not great for allowing you to model what will maximise your returns.

Overall though it's a good intro to the subject.