The discussion focuses on recommendations for cosmology books suitable for various knowledge levels. For beginners, "An Introduction to Modern Cosmology" by Andrew Liddle is suggested, along with a visually rich encyclopedia. Intermediate readers are directed to "Relativity, Gravitation and Cosmology: A Basic Introduction" by Ta-Pei Cheng. Advanced readers are advised to consider titles like "Modern Cosmology" by Scott Dodelson, "Physical Foundations of Cosmology" by Viatcheslav Mukhanov, and "Cosmology" by Steven Weinberg for comprehensive insights. Additionally, "Big Bang" by Simon Singh is highlighted as an engaging beginner's read that covers the history of cosmological theories.