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)

• When We Cease to Understand the World (by Benjamin Labatut)

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

• 3Blue1Brown 

• Vsauce

• Numberphile

• PBS Infinite Series

• Veritasium