Gallagher Girls Reading Order

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

2006

Cross My Heart and Hope to Spy

2007

Don't Judge a Girl by Her Cover

2009

Only the Good Spy Young

2010

Out of Sight, Out of Time

2012

A Gallagher Wedding

2013

United We Spy

2013

A Gallagher Wedding

2013

The Spies That Bind

2018