Great practical manual for startups and a useful trigger to make things happen in larger, slower paced enterprise environment.
Author will make you think different — embrace rapid change, quick iteration, testing the concept soon, part with ideas that don’t work easily and scale ones that do rapidly.
Product managers need this, designers need this, engineers need this.
Warning: you might not be comfortable with this, coming from a waterfall or waterfall-like agile. :)
One very valuable related article: Do things that don’t scale