The Human Factor in a Mission to Mars: An Interdisciplinary Approach

The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest for the Ultimate Theory

Endurance: A Year in Space, A Lifetime of Discovery

The Human Factor in the Settlement of the Moon: An Interdisciplinary Approach

Imminent: Inside the Pentagon's Hunt for UFOs

Death by Black Hole: And Other Cosmic Quandaries

The Magic of Reality: From the multi-million bestselling author of The God Delusion

The Extraterrestrial Species Almanac: The Ultimate Guide to Greys, Reptilians, Hybrids, and Nordics

The Astronomy Book: Big Ideas Simply Explained

Astrophysics for People in a Hurry

Philip's Exploring Stars and Planets

New Scientist: The Origin of (almost) Everything

Case for Mars

Research for a Future in Space: The Role of Life and Physical Sciences

Rocket Men: The Daring Odyssey of Apollo 8 and the Astronauts Who Made Man's First Journey to the Moon

Keys to Bioethics

The Science of Interstellar

Origins: Fourteen Billion Years of Cosmic Evolution

Accessory to War: The Unspoken Alliance Between Astrophysics and the Military