How We Tried to Design Our Own Book Cover (and How Jessica Hische Saved the Day)
Jake Knapp

I think that in order to fully embrace what you preach, you should have started sketching with pencil on paper. The quality of the sketches doesn’t matter, it would simply help you focusing on the concept of sprint / book cover, not so much on typography, colors, etc.

PS: Ordering the book as we speak ;)