OMG I went through a definite Christy stage when I was a tween. I still love the idea of them though I havent read any in decades. I think they ultimately fostered my imagination so much that I went on to become a ridiculously voracious reader. The first time I read 'And then there were None' aka 10 little indians I just couldnt believe how great a story it was - might have been 12yo. Then I learned that it was originally called 10 little (N words) and that was hugely disappointing. (I get that it was a product of the times etc, please dont come after me) I was also reading Victoria Holt and all the Poirots - and just started reading Sci-Fi! so I just moved on but I still (guiltily) love those Agatha Christy books that started it all. Miss Marple also rocks.