Erlend
13 Reads
 A City on Mars: Can We Settle Space, Should We Settle Space, and Have We Really thought This Through?
| 2023 | 40 reads | 4 | 449 pages? duration | |
 Our Final Invention
| 2015 | 13 reads | 3.38 | 336 pages? duration | |
 Social
| 2013 | 12 reads | 3.64 | 384 pages? duration |