Delphi Group Books in Order
Below you'll find the complete list of Delphi Group books in publication order. This is generally the recommended reading order for the series.
Reading order verified: January 2026
Publication Order
The Signal
Buy on Amazon2014
The Portal
Buy on Amazon2015
The Hades Conspiracy
Buy on Amazon2016
Betrayal
Buy on Amazon2017
The Island
Buy on Amazon2019
The Chamber
Buy on Amazon2020
The Anomaly
Buy on Amazon2021
The Ezekiel Code
Buy on Amazon2023
Frequently Asked Questions
The recommended reading order for the Delphi Group series is publication order: 1. The Signal (2014), 2. The Portal (2015), 3. The Hades Conspiracy (2016), 4. Betrayal (2017), 5. The Island (2019), and 3 more. This is generally the best way to experience the story as the author intended.
The Delphi Group series by John Sneeden contains 8 books. The series began in 2014 and continues to be a popular choice for readers.
The Delphi Group series is written by John Sneeden. You can find more books and series by this author on our website.
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