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Group Fifteen Files Books in Order
Below you'll find the complete list of Group Fifteen Files books in publication order. This is generally the recommended reading order for the series.
Reading order verified: March 2026
Quick Answer
What order should I read the Group Fifteen Files series? Start with "Scorpion (With: Mark Dawson)" (2017) and follow publication order through all 5 books.
The complete Group Fifteen Files reading order is listed below in publication sequence.
Publication Order
Scorpion (With: Mark Dawson)
2017
Witness X (By: Scott Mariani,Mark Dawson)
2017
Little Sister (By: Mark Dawson,Michael Ridpath)
2018
The Vault (By: Mark Dawson)
2020
Wormwood (By: Mark Dawson)
2022
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