Simon Sinek is a charismatic speaker with good points and interesting stories, but I find his books full of fluff: a central thesis padded to the length of a book so it’s publishable.

You get the same information by watching videos of his talks, with the advantage they are free, more direct, and take less of your time. Plus, they’re released sparingly and have quite a bit of repetition with slow changes between them, so the points get to sink in over time.