Sigma Force is a series of 22 books written by James Rollins. Here, you can see them all in order! (plus the year each book was published)
The author is James Rollins.
There are 22 books in the Sigma Force series.
The first book was written in 2004, and the last book was written in 2021 (we also added the publication year of each book right above the "View on Amazon" button).
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