He wrote several well-received books, including Assault on the Unknown about the International Geophysical Year; We are not alone, a bestseller about the search for extraterrestrial intelligence; Continents in Motion; Black Holes: The Edge of Space, The End of Time; and Landprints.
A scris mai multe cărți bine-primite, printre care Assault on the Unknown despre Anul Geofizic Internațional; We are not alone, un bestseller despre căutarea inteligenței extraterestre; Continents in Motion; Black Holes: the Edge of the Space, the End of Time; și Landprints.