In Chapter 19 of 23 in his 2013 Capture Your Flag interview, author and public speaker Simon Sinek answers "As You Have Been Writing the Second Book, How Has it Felt Differently Than the First?" He finds writing his first book "Start With Why" far easier than writing his second, "Leaders Eat Last." He notes how the first came naturally after years developing the concept in hiw work. It just required him writing down the ideas he had been using. The development of the second book was different.