Order of Book Series
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Indigo Investigations Books in Order

Indigo Investigations by R.A. Wallace contains 8 books, published in 2019. The first book is Act Fast (2019) and the newest is Past Memories (2019). Publication order is the reading order below.

Books
8
Published
2019
See all 8 books in order Printable Indigo Investigations checklist

All eight Indigo Investigations books carry a 2019 date, and R.A. Wallace is credited on every one. The run covers Act Fast, Classic Indigo, Mistaken Character, Troubled Waters, Undue Competition, Indigo Fallout, Party of Five and Past Memories. The catalogue records no subjects or page counts for Indigo Investigations.

How many Indigo Investigations books are there?

Indigo Investigations has 8 books, released in 2019.

Indigo Investigations Books in Publication Order

The table lists all 8 Indigo Investigations books in the order they were published, with the release year and how many independent book listings confirm each title. Catalogue data as of September 2026.

  1. 1
    Act Fast2019 · confirmed 1/4
    2019–
    Buy at Amazon USAmazon UK
  2. 2
    Classic Indigo2019 · confirmed 1/4
    2019–
    Buy at Amazon USAmazon UK
  3. 3
    Mistaken Character2019 · confirmed 1/4
    2019–
    Buy at Amazon USAmazon UK
  4. 4
    Troubled Waters2019 · confirmed 1/4
    2019–
    Buy at Amazon USAmazon UK
  5. 5
    Undue Competition2019 · confirmed 1/4
    2019–
    Buy at Amazon USAmazon UK
  6. 6
    Indigo Fallout2019 · confirmed 1/4
    2019–
    Buy at Amazon USAmazon UK
  7. 7
    Party of Five2019 · confirmed 1/4
    2019–
    Buy at Amazon USAmazon UK
  8. 8
    Past Memories2019 · confirmed 1/4
    2019–
    Buy at Amazon USAmazon UK

Is there a chronological order for Indigo Investigations?

No separate chronological order is on record for Indigo Investigations, because none of the book listings this catalogue draws on publishes one; the publication order above is the only order given.

Do you have to read Indigo Investigations books in order?

You should read the Indigo Investigations books in publication order, the order of the numbered table above. The catalogue does not record whether each Indigo Investigations book also stands alone.

Where to start with Indigo Investigations

Start with Act Fast (2019), the earliest published title.

What is the newest Indigo Investigations book?

Past Memories (2019) is the newest Indigo Investigations book released so far.

Is there a new Indigo Investigations book coming?

No next Indigo Investigations book is announced in the catalogue, which is a gap in the listings it merges rather than a sign that the run has ended.

Indigo Investigations at a glance

No recent titles
The newest Indigo Investigations title on record dates from 2019, 7 years ago. No later title is catalogued.
Release pace
Indigo Investigations books have appeared more than one a year on average.
Busiest decade
Most Indigo Investigations books, 8 of 8, were published in the 2010s.

More books by R.A. Wallace

The author page linked below lists every book in publication order.

Other series by R.A. Wallace

Each series linked below has its own reading-order page.