Reading order
| # | Title | Published | Author | Buy on Amazon |
|---|---|---|---|---|
| 1 | Hidden | 2021 | M.M. Crumley | Buy |
| 2 | Coup D’état | 2021 | M.M. Crumley | Buy |
| 3 | Ruthless | 2021 | M.M. Crumley | Buy |
| 4 | Instinct | 2021 | M.M. Crumley | Buy |
| 5 | Rogues | 2021 | M.M. Crumley | Buy |
| 6 | Empire | 2022 | M.M. Crumley | Buy |
| 7 | Omens | 2022 | M.M. Crumley | Buy |
| 8 | Chasm | 2022 | M.M. Crumley | Buy |
| 9 | Feral | 2022 | M.M. Crumley | Buy |
| 10 | Oblivion | 2023 | M.M. Crumley | Buy |
| 11 | Relentless | 2023 | M.M. Crumley | Buy |
| 12 | Requiem | 2023 | M.M. Crumley | Buy |
| 13 | Hellion | 2023 | M.M. Crumley | Buy |
| 14 | Regnum | 2023 | M.M. Crumley | Buy |
| 15 | Shadows | 2023 | M.M. Crumley | Buy |
| 16 | Indebted | 2024 | M.M. Crumley | Buy |
| 17 | Fathom | 2024 | M.M. Crumley | Buy |
| 18 | Ferocity | 2025 | M.M. Crumley | Buy |
| 19 | Onslaught | 2025 | M.M. Crumley | Buy |
| 20 | Echoes | 2025 | M.M. Crumley | Buy |
| 21 | Tempest | 2026 | M.M. Crumley | Buy |
The Immortal Doc Holliday is M.M. Crumley’s flagship series, reimagining the historical gunfighter and dentist John Henry “Doc” Holliday as an immortal who has survived into the modern era. The 21 books follow Doc as he confronts supernatural threats, old enemies, and the complications of living for over a century.
Published between 2021 and 2026, the series has maintained a rapid release schedule. Each book title is a single word (Hidden, Ruthless, Empire, Oblivion, etc.), and the series has built a following among urban fantasy readers who enjoy action-heavy supernatural fiction rooted in American history.