When did you start to like Zach?

[Tessa]

Hey guys - so my friend is reading Cross My Heart Hope to Spy right now and she said that she doesn't really like Zach yet... I told her to keep reading and he will become the best book character ever. I personally don't really remember if I liked him from the beginning because now I can't really imagine not liking him... just wondering if there was any particular point where you started to prefer Zach over Josh. I need to know when he becomes so obviously amazing for someone who has never read the series before so I can tell my friend.