Ocean Outpost: The Future of Humans Living Underwater (Springer Praxis Books/Popular Science)
Tourists in Space: A Practical Guide (Springer Praxis Books)
Martian Outpost: The Challenges of Establishing a Human Settlement on Mars (Springer Praxis Books)
Lunar Outpost: The Challenges of Establishing a Human Settlement on the Moon (Springer Praxis Books)
Beyond Human: Engineering Our Future Evolution (Science and Fiction)