After Psychocybernetics, one of these two will be my next read. I've heard from a few people that the books cover similar ground, but Blue Ocean Shift was written afterwards and is much more practical than Blue Ocean Strategy.
So if you have read both books, which one would you recommend to someone short on time who wants to get the most out of it?
I've read both and thought they were both excellent and practical (course, I'm still trading my time for money three years later so take that with a grain of salt haha). My view is that Blue Ocean Strategy, which came first, is a paradigm shifter. It takes a unique approach as to how entrepreneurs should think about innovation and competition. Blue Ocean Shift is for people who understand and accept the Blue Ocean Strategy already, and then gives more applicable ways to actually put it into practice when starting or growing a business, i.e. the "buyer utility map" and how to find pain points in existing industries.
You can read a summary of Blue Ocean Shift on Blinkist right now, which is giving free premium access for a few more weeks. I'd definitely read Blue Ocean Strategy in full though. Both books give real-world examples of the strategy put into practice.