Kolchak-1971
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James Rollins Sigma Series

#2

Sandstorm

#1 of 18 in Sigma Force

2004 • 153 Readers • 736 pages • 3.7

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#3

Map of Bones

#2 of 18 in Sigma Force

2004 • 93 Readers • 560 pages • 4.1

#4

Black Order

#3 of 18 in Sigma Force

2006 • 67 Readers • 421 pages • 4.2

#5

The Last Oracle

#5 of 18 in Sigma Force

2008 • 59 Readers • 4.2

#6

The Judas Strain

#4 of 18 in Sigma Force

2007 • 64 Readers • 4.1

#7

The Doomsday Key

#6 of 18 in Sigma Force

2009 • 51 Readers • 3.8

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#8

Cover 4

#6.5 of 18 in Sigma Force

2011 • 29 Readers • 48 pages • 3.8

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#9

The Devil Colony

#7 of 18 in Sigma Force

2011 • 48 Readers • 3.9

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