📖 About Agent 21

Agent 21 is a series universe written by Chris Ryan. The complete collection runs to 7 books across 1 series, published between 2010 and 2016.

The main series is Publication Order of Agent 21 Books with 7 books. It opens with Agent 21 (2010) and currently runs to Endgame (2016).

Series included on this page:

🎯 Where to Start with Agent 21

New readers should begin with the first book of the main series in publication order: Agent 21 (2010), book 1 of Publication Order of Agent 21 Books. Reading in publication order lets the world and characters develop the way the author intended, and it avoids spoilers that later books may contain.

Each of the 1 series on this page is expandable — click a series heading to see every title it contains, in order, with a direct link to buy the book on Amazon.

📚 Agent 21 Books in Order

Publication Order of Agent 21 Books
7 books
1
Agent 21 book cover1Agent 212010Buy on Amazon
Reloaded book cover2Reloaded2012Buy on Amazon
Codebreaker book cover3Codebreaker2013Buy on Amazon
The Wire book cover4The Wire2013Buy on Amazon
Deadfall book cover5Deadfall2014Buy on Amazon
Under Cover book cover6Under Cover2015Buy on Amazon
Endgame book cover7Endgame2016Buy on Amazon

❓ Frequently Asked Questions

How many Agent 21 books are there?
There are 7 books in the Agent 21 collection, organised into 1 series and published between 2010 and 2016.
What is the first Agent 21 book?
The first book is Agent 21, published in 2010.
What order should I read the Agent 21 books in?
Most readers use publication order, which is the order the books were originally released. A chronological order is also provided on this page for readers who prefer to follow the internal timeline of the story.
Who wrote the Agent 21 books?
The Agent 21 books were written by Chris Ryan.
Is the Agent 21 series finished?
The main series, Publication Order of Agent 21 Books, has 7 books so far. The most recent title listed on this page gives the current end point of the series.
When did the Agent 21 series start?
The earliest title in this collection was published in 2010, and the most recent in 2016.