| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2013 | 978-0-9894721-0-4 | Richard Hammack | Book of Proof |
| 2016 | 978-0-9894721-1-1 | Richard H. Hammack | Book of Proof |
| 2018 | 978-0-9894721-2-8 | Richard Hammack | Book of Proof |
| 2019 | 978-0-9894721-3-5 | Richard H. Hammack | Book of Proof |