| Books in this series: |
| 1 | I'd Tell You I Love You, But Then I'd Have to Kill You | 2006 | 2 | Cross My Heart and Hope to Spy | 2007 | 3 | Don't Judge a Girl by Her Cover | 2009 | 4 | Only the Good Spy Young | 2010 | 5 | Out of Sight, Out of Time | 2012 | 6 | United We Spy | 2013 | + | Double Crossed: A Spies and Thieves Story | 2013 |