25 books in series

Sigma Force

Sigma Force is a 25-book series with 18 primary works first released in 2004 with contributions by James Rollins and Steve Berry.

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A Cidade Perdida

#1Popular

2004 • 78 Readers • 480 pages • 3.7

Map of Bones
#2First

2004 • 53 Readers • 560 pages • 4.2

Unrestricted Access: New and Classic Short Fiction
#2.5

2020 • 6 Readers

Black Order
#3

2006 • 32 Readers • 421 pages • 4.1

The Judas Strain
#4

2007 • 29 Readers • 4.4

The Last Oracle
#5

2008 • 25 Readers • 4.4

The Doomsday Key
#6

2009 • 24 Readers • 4

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The Skeleton Key

#6.5

2011 • 14 Readers • 48 pages • 3.9

The Devil Colony
#7

2011 • 27 Readers • 3.9

Tracker
#7.5

2012 • 10 Readers • 67 pages • 4

Bloodline
#8

2012 • 31 Readers • 4

The Eye of God
#9

2013 • 27 Readers • 3.9

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The Devil's Bones

#9.5

2014 • 1 Reader • 4

The 6th Extinction
#10

2014 • 20 Readers • 608 pages • 3.9

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The Midnight Watch

#10.5

2015 • 7 Readers • 59 pages • 3.8

The Bone Labyrinth
#11

2015 • 34 Readers • 501 pages • 4.1

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Crash and Burn

#11.5

2016 • 8 Readers • 54 pages • 3.5

The Seventh Plague
#12

2016 • 22 Readers • 448 pages • 4

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Ghost Ship

#12.5

2017 • 6 Readers • 56 pages • 3.8

The Demon Crown
#13

2017 • 21 Readers • 448 pages • 4.2

Crucible
#14

2019 • 20 Readers • 4.1

The Last Odyssey
#15

2020 • 15 Readers • 624 pages • 4.4

Kingdom of Bones
#16

2021 • 15 Readers • 448 pages • 3.3

Tides of Fire
#17

2023 • 11 Readers • 448 pages • 4.3

Arkangel
#18

2024 • 6 Readers • 672 pages • 12h