The best one IMHO:

"Cosmos," by Carl Sagan

This is one of the best-selling science books of all time. I've never read it, so I ordered it after reading the blurb: "retraces the fourteen billion years of cosmic evolution that have transformed matter into consciousness, exploring such topics as the origin of life, the human brain, Egyptian hieroglyphics, spacecraft missions, the death of the Sun, the evolution of galaxies, and the forces and individuals who helped to shape modern science."