Agent 21 is a series of 7 books written by Chris Ryan. Here, you can see them all in order! (plus the year each book was published)
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7 books in this series
The author is Chris Ryan.
There are 7 books in the Agent 21 series.
The first book was written in 2010, and the last book was written in 2016 (we also added the publication year of each book right above the "View on Amazon" button).