Computer Simulations of Space Societies
https://www.springer.com/us/book/9783319905594
What We Know About Extraterrestrial Intelligence
https://www.springer.com/us/book/9783319444550
The Ethics of Space Exploration
https://www.springer.com/us/book/9783319398259
Dissent, Revolution and Liberty Beyond Earth
https://www.springer.com/us/book/9783319293479
Human Governance Beyond Earth
https://www.springer.com/us/book/9783319180625
The Meaning of Liberty Beyond Earth
https://www.springer.com/us/book/9783319095660
Extraterrestrial Intelligence and Human Imagination
https://www.springer.com/us/book/9783319105505
New Comparative Metric for Evaluating Spacecraft Radiation Shielding
https://arc.aiaa.org/doi/abs/10.2514/1.A34360