These buku were amazing. The first book was a little light, but the buku get way better. Ally Carter is a genius for being able to produce such amazing books. The girls in the book are so strong, brave, and independant. The boys in the book get lebih and lebih important as it goes along, that's something that i like about the buku alot. They're very mysterious too. There are 4 buku in all, I'd Tell anda I cinta You, But Then I'd Have To Kill You, menyeberang, salib My jantung And Hope To Spy, Don't Judge A Girl oleh Her Cover, Only The Good Spy Young. An amazing serious about hilarious, dangerous, mysterious missions. Definetly a great read.