Series reading guide · updated 2026
Code Red Books in Order
Every Code Red book in publication order — 8 in total, spanning 2004–2009.
Publication Order of Code Red Books
| # | Title | Year | Get it |
|---|---|---|---|
| 1 | The Unknown Twin — Kathryn Shay | 2004 | Amazon US UK |
| 2 | Tremors — Debra Webb | 2005 | Amazon US UK |
| 3 | Flash Flood — Chris Ryan | 2006 | Amazon US UK |
| 4 | Wildfire — Chris Ryan | 2007 | Amazon US UK |
| 5 | Outbreak — Chris Ryan | 2007 | Amazon US UK |
| 6 | Vortex — Chris Ryan | 2008 | Amazon US UK |
| 7 | Twister — Chris Ryan | 2008 | Amazon US UK |
| 8 | Battleground — Chris Ryan | 2009 | Amazon US UK |
Every title by year All 8, oldest to newest
| # | Title | Year | Get it |
|---|---|---|---|
| 1 | The Unknown Twin — Kathryn Shay | 2004 | Amazon US UK |
| 2 | Tremors — Debra Webb | 2005 | Amazon US UK |
| 3 | Flash Flood — Chris Ryan | 2006 | Amazon US UK |
| 4 | Wildfire — Chris Ryan | 2007 | Amazon US UK |
| 5 | Outbreak — Chris Ryan | 2007 | Amazon US UK |
| 6 | Vortex — Chris Ryan | 2008 | Amazon US UK |
| 7 | Twister — Chris Ryan | 2008 | Amazon US UK |
| 8 | Battleground — Chris Ryan | 2009 | Amazon US UK |
As an Amazon Associate we earn from qualifying purchases.