25 books in series

Sigma Force

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

#1
A Cidade Perdida

#1 of 18 in Sigma Force

2004 • 126 Readers • 480 pages • 3.8

#2
Map of Bones

#2 of 18 in Sigma Force

2004 • 78 Readers • 560 pages • 4.2

#2.5
Cover 6

#2.5 of 18 in Sigma Force

2006 • 1 Reader • 400 pages

#3
Black Order

#3 of 18 in Sigma Force

2006 • 55 Readers • 421 pages • 4.2

#4
The Judas Strain

#4 of 18 in Sigma Force

2007 • 49 Readers • 4.1

#5
The Last Oracle

#5 of 18 in Sigma Force

2008 • 45 Readers • 4.3

#6
The Doomsday Key

#6 of 18 in Sigma Force

2009 • 32 Readers • 4

#6.5
Cover 4

#6.5 of 18 in Sigma Force

2011 • 19 Readers • 48 pages • 3.9

#7
The Devil Colony

#7 of 18 in Sigma Force

2011 • 40 Readers • 3.8

#7.5
Tracker

#7.5 of 18 in Sigma Force

2012 • 16 Readers • 67 pages • 4.1

#8
Bloodline

#8 of 18 in Sigma Force

2012 • 36 Readers • 4.1

#9
The Eye of God

#9 of 18 in Sigma Force

2013 • 36 Readers • 4.1

#9.5
Cover 4

#9.5 of 19 in Cotton Malone

2014 • 2 Readers • 4

#10
The 6th Extinction

#10 of 18 in Sigma Force

2014 • 29 Readers • 608 pages • 4

#10.5
Cover 1

#10.5 of 18 in Sigma Force

2015 • 10 Readers • 59 pages • 4

#11
The Bone Labyrinth

#11 of 18 in Sigma Force

2015 • 40 Readers • 688 pages • 3.9

#11.5
Cover 5

#11.5 of 18 in Sigma Force

2016 • 12 Readers • 54 pages • 3.7

#12
The Seventh Plague

#12 of 18 in Sigma Force

2016 • 31 Readers • 448 pages • 3.9

#12.5
Cover 1

#12.5 of 18 in Sigma Force

2017 • 9 Readers • 56 pages • 3.8

#13
The Demon Crown

#13 of 18 in Sigma Force

2017 • 27 Readers • 448 pages • 4.1

#14
Crucible

#14 of 18 in Sigma Force

2019 • 30 Readers • 4

#15
The Last Odyssey

#15 of 18 in Sigma Force

2020 • 26 Readers • 624 pages • 4.1

#16
Kingdom of Bones

#16 of 18 in Sigma Force

2021 • 25 Readers • 448 pages • 3.6

#17
Tides of Fire

#17 of 18 in Sigma Force

2023 • 19 Readers • 448 pages • 4.3

#18
Arkangel

#18 of 18 in Sigma Force

2024 • 11 Readers • 672 pages • 12h • 4.7