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Gallagher Girls

A complete six-book YA spy-school series, with an optional prequel novella and a crossover with Heist Society.

Quick answer
Start with
I'd Tell You I Love You, But Then I'd Have to Kill You
Main books
6
Total works
7
Status
Completecomplete
Read in order
Yes
Genre
YA Mystery, YA Thriller
Commitment
medium
Latest
United We Spy
Extras
1 tracked

Main Series Reading Order

  1. Book 01

    I'd Tell You I Love You, But Then I'd Have to Kill You

    Main
  2. Book 02

    Cross My Heart and Hope to Spy

    Main
  3. Book 03

    Don't Judge a Girl by Her Cover

    Main
  4. Book 04

    Only the Good Spy Young

    Main
  5. Book 05

    Out of Sight, Out of Time

    Main
  6. Book 06

    United We Spy

    Main
  1. Book 01

    I'd Tell You I Love You, But Then I'd Have to Kill You

  2. Book 02

    Cross My Heart and Hope to Spy

  3. Book 03

    Don't Judge a Girl by Her Cover

  4. Book 04

    Only the Good Spy Young

  5. Book 05

    Out of Sight, Out of Time

  6. Book 06

    United We Spy

Chronological Order

  1. Book 01

    The Spies That Bind

    Prequel · optional
  2. Book 01

    I'd Tell You I Love You, But Then I'd Have to Kill You

  3. Book 02

    Cross My Heart and Hope to Spy

  4. Book 03

    Don't Judge a Girl by Her Cover

  5. Book 04

    Only the Good Spy Young

  6. Book 05

    Out of Sight, Out of Time

  7. Book 06

    United We Spy

Optional Extras

These works add context without changing the main-series count.

  1. 1. The Spies That Bind
    Prequel · optional

Crossover Works

  1. Book 01

    Double Crossed

    Novella · optional

Reader fit

YA MysteryYA ThrillerTeen Detective

Frequently Asked Questions

Is Gallagher Girls complete?

Yes. The main Gallagher Girls arc is complete at six novels; The Spies That Bind is an optional prequel novella.