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2 Sisters Detective Agency

by James Patterson

The 2 Sisters Detective Agency series by James Patterson has 2 known books (2 published). It is best read in publication order, starting with 2 Sisters Detective Agency (2021). 2 Sisters Murder Investigations is the latest book with a fully recorded publication date.

Books
2 known books (2 novels)
Published
2
First published
2021
Status
ongoing
Shelved under
Thriller
Start here: 2 Sisters Detective Agency (2021) — then read straight through in publication order.
Book one
Cover of 2 Sisters Detective Agency
2 Sisters Detective Agency (2021)

Reading order

The date order of published books and any announced future entries — the default way to read the series.

  1. 2 Sisters Detective Agency

    Novel
    2 Sisters Detective Agency, published in October 2021 by James Patterson and Candice Fox, opens the series at 416 pages, introducing former attorney Rhonda Bird and her street-smart half-sister Baby as they unexpectedly inherit a struggling Los Angeles detective agency.
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  2. 2 Sisters Murder Investigations

    Novel
    2 Sisters Murder Investigations followed in April 2025 at a shorter 368 pages, continuing Rhonda and Baby's partnership with a self-contained case that builds on the agency established in the first book.
    View book

Key facts about the 2 Sisters Detective Agency series

The 2 Sisters Detective Agency series has 2 books on our list. Since all 2 are out now, you can read the whole list today.

Start with 2 Sisters Detective Agency, since it opens the publication order in 2021. 2 Sisters Murder Investigations is book 2, from 2025.

Each title links to its own page, while the list keeps them in date order. Each book page shows its dates and editions.

2 Sisters Murder Investigations is the latest book with a full release date, out on 1 April 2025. The catalogue marks it as ongoing, yet no next book has a date so far.

The books came out between 2021 and 2025, while their length runs from 368 to 416 pages. That is a run of 4 years.

James Patterson has 196 books on our list. Additionally, they write Alex Cross, Women's Murder Club and Honeymoon, plus 12 more series. We shelve the books under thriller.

About the 2 Sisters Detective Agency series

Rhonda Bird is a buttoned-up former attorney; her teenage half-sister Baby is a street-smart survivor with none of Rhonda's polish. When they unexpectedly inherit a struggling Los Angeles detective agency, the mismatched pair have to learn to work together while untangling cases that reach into the city's darker corners. James Patterson and Candice Fox -- also his collaborators on Detective Harriet Blue and the Bill Robinson/Inn series -- use the sisters' contrasting styles and generational gap for both the series' investigative dynamic and its comic friction.

2 Sisters Detective Agency (2021) sets up the inheritance and the sisters' uneasy partnership; 2 Sisters Murder Investigations (2025) continues their casework as the agency (and their relationship) develops.

Frequently asked questions

How many 2 Sisters Detective Agency books are there?

Two: 2 Sisters Detective Agency (2021) and 2 Sisters Murder Investigations (2025).

What order should I read the 2 Sisters Detective Agency books in?

Publication order -- 2 Sisters Detective Agency, then 2 Sisters Murder Investigations.

Who are the two sisters?

Rhonda Bird, a former attorney, and her teenage half-sister Barbara 'Baby' Bird, who inherit and run a Los Angeles detective agency together.

Who writes the series?

James Patterson co-writes with Australian crime novelist Candice Fox, his collaborator on Detective Harriet Blue and the Bill Robinson series.

Is there a third book coming?

No further title had been announced as of this writing.

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