Gallagher Girls: I'd Tell You I Love You, but then I'd Have to Kill You: Book 1: the million copy selling series set at an elite boarding school for spies

Gallagher Girls: I'd Tell You I Love You, but then I'd Have to Kill You: Book 1: the million copy selling series set at an elite boarding school for spies

Gallagher Girls Series

by Ally Carter

(24 reviews)

The Gallagher Girls is an exciting YA spy series by Ally Carter, with plenty of plot twists, drama and subterfuge.

Gallagher Academy is a front. Purporting to be a school for geniuses, it is actually a training ground for world-class spies.

Cammie Morgan ought to be equipped for anything - she can speak fourteen languages, hack into a mainframe, and kill a man in seven different ways - but life at Gallagher Academy is never straightforward. Danger seems to follow Cammie wherever she goes and the stakes are high as she has to deal with double agents, kidnappings, exhilarating missions, and even romance.

The Gallagher Girls series is perfect for fans of Murder Most Unladylike, One of Us is Lying and Ruby Redfort aged 12+

All the Gallagher Girls books in order:

Book 1: I'd Tell You I Love You, But Then I'd Have To Kill You (First published 2006, new edition 2026)
Book 2: Cross My Heart and Hope to Spy (First published 2007, new edition 2026)
Book 3: Don't Judge a Girl by Her Cover (First published 2009, new edition 2026)
Book 4: Only The Good Spy Young (First published 2010, new edition 2026)
Book 5: Out of Sight, Out of Time (First published 2012, new edition 2026)
Book 6: United we Spy (First published 2013, new edition 2026)

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Ally Carter (7)

Book 1

Gallagher Girls: I'd Tell You I Love You, but then I'd Have to Kill You: Book 1: the million copy selling series set at an elite boarding school for spies

Gallagher Girls: I'd Tell You I Love You, but then I'd Have to Kill You: Book 1: the million copy selling series set at an elite boarding school for spies

Book 1

Gallagher Girls: I'd Tell You I Love You, but then I'd Have to Kill You: Book 1: the million copy selling series set at an elite boarding school for spies

The first book in the million copy selling Gallagher Girls series set at an elite boarding school for spies. Perfect for... MoreGallagher Girls: I'd Tell You I Love You, but then I'd Have to Kill You: Book 1: the million copy selling series set at an elite boarding school for spies

(4 reviews) 5 4

Review

Book 2

Gallagher Girls: Cross My Heart and Hope To Spy: Book 2: the million copy selling series set at an elite boarding school for spies

Gallagher Girls: Cross My Heart and Hope To Spy: Book 2: the million copy selling series set at an elite boarding school for spies

Book 2

Gallagher Girls: Cross My Heart and Hope To Spy: Book 2: the million copy selling series set at an elite boarding school for spies

The second book in the million copy selling Gallagher Girls series set at an elite boarding school for spies. Perfect fo... MoreGallagher Girls: Cross My Heart and Hope To Spy: Book 2: the million copy selling series set at an elite boarding school for spies

(6 reviews) 5 6

Review

Book 3

Gallagher Girls: Don't Judge a Girl by Her Cover: Book 3: the million copy selling series set at an elite boarding school for spies

Gallagher Girls: Don't Judge a Girl by Her Cover: Book 3: the million copy selling series set at an elite boarding school for spies

Book 3

Gallagher Girls: Don't Judge a Girl by Her Cover: Book 3: the million copy selling series set at an elite boarding school for spies

The third book in the million copy selling Gallagher Girls series set at an elite boarding school for spies. Perfect for... MoreGallagher Girls: Don't Judge a Girl by Her Cover: Book 3: the million copy selling series set at an elite boarding school for spies

(5 reviews) 5 5

Review

Book 4

Gallagher Girls: Only The Good Spy Young: Book 4: the million copy selling series set at an elite boarding school for spies

Gallagher Girls: Only The Good Spy Young: Book 4: the million copy selling series set at an elite boarding school for spies

Book 4

Gallagher Girls: Only The Good Spy Young: Book 4: the million copy selling series set at an elite boarding school for spies

The fourth book in the million copy selling Gallagher Girls series set at an elite boarding school for spies. Perfect fo... MoreGallagher Girls: Only The Good Spy Young: Book 4: the million copy selling series set at an elite boarding school for spies

(3 reviews) 5 3

Review

Book 5

Gallagher Girls: Out of Sight, Out of Time: Book 5: the million copy selling series set at an elite boarding school for spies

Gallagher Girls: Out of Sight, Out of Time: Book 5: the million copy selling series set at an elite boarding school for spies

Book 5

Gallagher Girls: Out of Sight, Out of Time: Book 5: the million copy selling series set at an elite boarding school for spies

The fifth book in the million copy selling Gallagher Girls series set at an elite boarding school for spies. Perfect for... MoreGallagher Girls: Out of Sight, Out of Time: Book 5: the million copy selling series set at an elite boarding school for spies

(3 reviews) 5 3

Review

Book 6

Gallagher Girls: United We Spy: Book 6: the million copy selling series set at an elite boarding school for spies

Gallagher Girls: United We Spy: Book 6: the million copy selling series set at an elite boarding school for spies

Book 6

Gallagher Girls: United We Spy: Book 6: the million copy selling series set at an elite boarding school for spies

The sixth and final book in the million copy selling Gallagher Girls series set at an elite boarding school for spies. P... MoreGallagher Girls: United We Spy: Book 6: the million copy selling series set at an elite boarding school for spies

(3 reviews) 5 3

Review

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New Book

Gallagher Girls: I'd Tell You I Love You, but then I'd Have to Kill You: Book 1: the million copy selling series set at an elite boarding school for spies

Gallagher Girls: I'd Tell You I Love You, but then I'd Have to Kill You: Book 1: the million copy selling series set at an elite boarding school for spies

Gallagher Girls: I'd Tell You I Love You, but then I'd Have to Kill You: Book 1: the million copy selling series set at an elite boarding school for spies

30th July 2026

(4 reviews) 5 4

Most Popular Book

Gallagher Girls: Cross My Heart and Hope To Spy: Book 2: the million copy selling series set at an elite boarding school for spies

Gallagher Girls: Cross My Heart and Hope To Spy: Book 2: the million copy selling series set at an elite boarding school for spies

Gallagher Girls: Cross My Heart and Hope To Spy: Book 2: the million copy selling series set at an elite boarding school for spies

30th July 2026

(6 reviews) 5 6

Coming Soon

Gallagher Girls: United We Spy: Book 6: the million copy selling series set at an elite boarding school for spies

Gallagher Girls: United We Spy: Book 6: the million copy selling series set at an elite boarding school for spies

Gallagher Girls: United We Spy: Book 6: the million copy selling series set at an elite boarding school for spies

Paperback

30th July 2026