The age-old question “Why is the sky blue?” begins a quest through science, history, and art, from Aristotle and Newton through Goethe and Einstein. “Blue is a theme throughout the book – and not just sky blue. Each of the ten chapters has blue in its title, from the opening ‘Out of the Blue’ to the concluding ‘The Perfect Blue.’ Pesic not only traces the scientific legacy of concepts and discoveries that have led to our current understanding of the sky’s usual color, he also weaves into his tale cultural uses of the color blue…A delightful and informative read” – Science