Following are highly recommended novels/books -

• Godel, Escher, Bach: an Eternal Golden Braid (by Douglas R. Hofstadter)
• Fermat's Last Theorem (by Simon Singh)
• Chaos (by James Gleick)
• The Information: A History. A Theory. A Flood (by James Gleick)
• Logicomix (by Christos Papadimitriou)
• The Man Who Knew Infinity (by Robert Kanigel)
• A Beautiful Mind (by Sylvia Nasar)
• The Last Lecture (by Randy Pausch)
• Flatland: A Romance of Many Dimensions (by Edwin Abbott)
• A Brief History of Humankind (by Yuval Harari)

Following are fun youtube channels, providing an insight to the enriching world of knowledge -

• 3Blue1Brown
• Vsauce
• Numberphile
• PBS Infinite Series
• Tipping Point Math