These libros were amazing. The first book was a little light, but the libros 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 más and más important as it goes along, that's something that i like about the libros alot. They're very mysterious too. There are 4 libros in all, I'd Tell tu I amor You, But Then I'd Have To Kill You, cruzar, cruz My corazón And Hope To Spy, Don't Judge A Girl por Her Cover, Only The Good Spy Young. An amazing serious about hilarious, dangerous, mysterious missions. Definetly a great read.