Series reading guide · updated 2026
Gallagher Girls Books in Order
Every Gallagher Girls book in publication order — 6 in total, spanning 2006–2013.
Publication Order of Gallagher Girls Books
| # | Title | Year | Get it |
|---|---|---|---|
| 1 | I'd Tell You I Love You, But Then I'd Have to Kill You | 2006 | Amazon US UK |
| 2 | Cross My Heart and Hope to Spy | 2007 | Amazon US UK |
| 3 | Don't Judge a Girl by Her Cover | 2009 | Amazon US UK |
| 4 | Only the Good Spy Young | 2010 | Amazon US UK |
| 5 | Out of Sight, Out of Time | 2012 | Amazon US UK |
| 6 | United We Spy | 2013 | Amazon US UK |
Every title by year All 6, oldest to newest
| # | Title | Year | Get it |
|---|---|---|---|
| 1 | I'd Tell You I Love You, But Then I'd Have to Kill You | 2006 | Amazon US UK |
| 2 | Cross My Heart and Hope to Spy | 2007 | Amazon US UK |
| 3 | Don't Judge a Girl by Her Cover | 2009 | Amazon US UK |
| 4 | Only the Good Spy Young | 2010 | Amazon US UK |
| 5 | Out of Sight, Out of Time | 2012 | Amazon US UK |
| 6 | United We Spy | 2013 | Amazon US UK |
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