Indigo Investigations Books in Order
Below you'll find the complete list of Indigo Investigations books in publication order. This is generally the recommended reading order for the series.
Reading order verified: January 2026
Publication Order
Act Fast
Buy on Amazon2019
Classic Indigo
Buy on Amazon2019
Mistaken Character
Buy on Amazon2019
Troubled Waters
Buy on Amazon2019
Undue Competition
Buy on Amazon2019
Indigo Fallout
Buy on Amazon2019
Party of Five
Buy on Amazon2019
Past Memories
Buy on Amazon2019
Frequently Asked Questions
The recommended reading order for the Indigo Investigations series is publication order: 1. Act Fast (2019), 2. Classic Indigo (2019), 3. Mistaken Character (2019), 4. Troubled Waters (2019), 5. Undue Competition (2019), and 3 more. This is generally the best way to experience the story as the author intended.
The Indigo Investigations series by R.A. Wallace contains 8 books. The series began in 2019 and continues to be a popular choice for readers.
The Indigo Investigations series is written by R.A. Wallace. You can find more books and series by this author on our website.
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