Note: There are other series with the same name: Extinction Cycle (various authors)
- Series: Extinction Cycle Series Record # 41845
- Sub-series of: Extinction Cycle Universe
- Series Tags: military sf (7), post apocalypse (7), genetic engineering (7), near future (5)
- Extinction Cycle
- 0 Extinction Red Line (2018) by Tom Abrahams and Nicholas Sansbury Smith
- 1 Extinction Horizon (2014) by Nicholas Sansbury Smith
- 2 Extinction Edge (2015) by Nicholas Sansbury Smith
- 3 Extinction Age (2015) by Nicholas Sansbury Smith
- 4 Extinction Evolution (2015) by Nicholas Sansbury Smith
- 5 Extinction End (2016) by Nicholas Sansbury Smith
- 6 Extinction Aftermath (2016) by Nicholas Sansbury Smith
- 6.5 Extinction Lost (2016) [SF] by Nicholas Sansbury Smith
- 7 Extinction War (2017) by Nicholas Sansbury Smith
- The Extinction Cycle Boxed Set: Books 1-3 (2016) [O/1-3] by Nicholas Sansbury Smith
- The Extinction Cycle Boxed Set: Books 4-7 (2017) [O/4-7] by Nicholas Sansbury Smith