More childish than I remember the last one being haha. and oh my goodness how cheesy can a book get! Towards the end of the book I did kind of begin to find Cammie to be a little annoying, constantly "oh I can't possibly do that but I'll do it anyway because my friends are telling me to and I don't have a strong enough character to stand up and say no."
I did enjoy it, a nice lighthearted read with lots of funny parts.
Bit unrealistic though, the spy girls were so hopeless even though they're constantly being trained (I mean, come on they're supposed to be spies, I would be expected every girl in the entire school to have checked out what was happening in the mysterious East Wing or to at least have planted cameras), and the teachers were a bit hopeless too ("Oh I know let's discuss some top secret stuff right outside these closed doors and not check if someone is stood behind these closed doors...")
But it was a nice read!