Reading order · 18 books · 2004 to 2024 · Set around the world
Sigma Force Books in Order
Sigma Force is a secret team of scientists retrained as soldiers, working for DARPA. Led in the field by Commander Grayson Pierce, they race against villains to uncover secrets where science, history and myth meet.
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Series facts
The reading order
Every Sigma Force book in publication order. Choose a title for its cast and summary.
18 books · Set around the world
- 1Sandstorm2004With Painter CroweAn explosion at the British Museum leads Painter Crowe and a team of scientists to the deserts of Arabia and the lost city of Ubar.Buy on Amazon
- 2Map of Bones2005With Grayson PierceThe bones of the Magi are stolen from Cologne Cathedral, and Grayson Pierce leads Sigma Force on a hunt across Europe.Buy on Amazon
- 3Black Order2006With Grayson PierceA massacre at a Himalayan monastery and the theft of a rare book in Copenhagen lead Sigma to a secret Nazi experiment.Buy on Amazon
- 4The Judas Strain2007With Grayson PierceA deadly plague emerges from the sea, and Sigma follows the clues in Marco Polo’s travels to find a cure.Buy on Amazon
- 5The Last Oracle2008With Grayson PierceA dying man’s coin from Delphi leads Sigma to India and to children with strange gifts.Buy on Amazon
- 6The Doomsday Key2009With Grayson PierceMysterious deaths at Princeton, the Vatican and in Africa lead Sigma to an ancient secret recorded in the Domesday Book.Buy on Amazon
- 7The Devil Colony2010With Grayson PierceMummified bodies found in a cave in Utah lead Sigma to secrets kept by the Founding Fathers.Buy on Amazon
- 8Bloodline2012With Grayson PierceThe President’s pregnant daughter is kidnapped, and Sigma uncovers a plot connected to the search for long life.Buy on Amazon
- 9The Eye of God2013With Grayson PierceA satellite crashes in Mongolia, and Sigma traces its secrets back to Genghis Khan.Buy on Amazon
- 10The 6th Extinction2014With Grayson PierceA distress call from a military research station in California leads Sigma to the frozen depths of Antarctica.Buy on Amazon
- 11The Bone Labyrinth2015With Grayson PierceA discovery in a Croatian cave leads Sigma into the mystery of how human intelligence began.Buy on Amazon
- 12The Seventh Plague2016With Grayson PierceAn archaeologist missing in the Sudanese desert returns, carrying an ancient plague.Buy on Amazon
- 13The Demon Crown2017With Grayson PierceAn ancient threat hidden in the Smithsonian is unleashed in Hawaii.Buy on Amazon
- 14Crucible2019With Grayson PierceAn attack on Christmas Eve sends Gray on a hunt that links the witch trials of the past to artificial intelligence.Buy on Amazon
- 15The Last Odyssey2020With Grayson PierceA ship found frozen in the Greenland ice leads Sigma to the truth behind Homer’s Odyssey.Buy on Amazon
- 16Kingdom of Bones2021With Grayson PierceA strange plague spreading through the Congo leads Sigma deep into the African jungle.Buy on Amazon
- 17Tides of Fire2023With Grayson PierceA disaster on Australia’s Great Barrier Reef sends Sigma racing against a threat from beneath the sea.Buy on Amazon
- 18Arkangel2024With Grayson PierceA Vatican archivist’s murder near the Kremlin uncovers a conspiracy reaching back to the tsars, and Sigma Force follows the trail into the Arctic.Buy on Amazon
Do you need to read them in order?
Read in order, starting with Sandstorm or Map of Bones. Each book is a complete adventure.
Who appears in which book
The series’ main characters, book by book. Lead means the book is told around them; minor covers cameos.
| Book | Grayson Pierce | Painter Crowe | Monk Kokkalis | Kat Bryant | Seichan | Lisa Cummings | Joe Kowalski | Vigor Verona |
|---|---|---|---|---|---|---|---|---|
| 1 Sandstorm | ·Minor | LLead | MMajor | MMajor | ||||
| 2 Map of Bones | LLead | MMajor | MMajor | MMajor | MMajor | MMajor | ||
| 3 Black Order | LLead | MMajor | MMajor | MMajor | ·Minor | |||
| 4 The Judas Strain | LLead | MMajor | MMajor | MMajor | MMajor | ·Minor | MMajor | |
| 5 The Last Oracle | LLead | MMajor | MMajor | MMajor | MMajor | ·Minor | MMajor | |
| 6 The Doomsday Key | LLead | MMajor | MMajor | MMajor | MMajor | ·Minor | MMajor | MMajor |
| 7 The Devil Colony | LLead | MMajor | MMajor | MMajor | MMajor | ·Minor | MMajor | |
| 8 Bloodline | LLead | MMajor | MMajor | MMajor | MMajor | ·Minor | MMajor | |
| 9 The Eye of God | LLead | MMajor | MMajor | MMajor | MMajor | ·Minor | MMajor | |
| 10 The 6th Extinction | LLead | MMajor | MMajor | MMajor | MMajor | ·Minor | MMajor | |
| 11 The Bone Labyrinth | LLead | MMajor | MMajor | MMajor | MMajor | ·Minor | MMajor | ·Minor |
| 12 The Seventh Plague | LLead | MMajor | MMajor | MMajor | MMajor | ·Minor | MMajor | |
| 13 The Demon Crown | LLead | MMajor | MMajor | MMajor | MMajor | ·Minor | MMajor | |
| 14 Crucible | LLead | MMajor | MMajor | MMajor | MMajor | ·Minor | MMajor | |
| 15 The Last Odyssey | LLead | MMajor | MMajor | MMajor | MMajor | ·Minor | MMajor | |
| 16 Kingdom of Bones | LLead | MMajor | MMajor | MMajor | MMajor | ·Minor | MMajor | |
| 17 Tides of Fire | LLead | MMajor | MMajor | MMajor | MMajor | ·Minor | MMajor | |
| 18 Arkangel | LLead | MMajor | MMajor | MMajor | MMajor | ·Minor | MMajor |
Characters in the Sigma Force books
9 characters from James Rollins’s chart, with the number of Sigma Force books each appears in.
| Character | Books | First in this series |
|---|---|---|
| Grayson PierceSigma Force commander | 18 | Sandstorm 2004 |
| Painter CroweSigma Force director | 18 | Sandstorm 2004 |
| Monk KokkalisSigma operative and Gray’s best friend | 18 | Sandstorm 2004 |
| Kat BryantSigma analyst, Monk’s wife | 18 | Sandstorm 2004 |
| SeichanFormer assassin and Gray’s partner | 16 | Map of Bones 2005 |
| Lisa CummingsDoctor and Painter’s partner | 16 | Black Order 2006 |
| Joe KowalskiEx-Navy sailor and Sigma muscle | 15 | The Judas Strain 2007 |
| Vigor VeronaVatican archivist | 3 | Map of Bones 2005 |
| Rachel VeronaItalian carabinieri officer | 2 | Map of Bones 2005 |