Harry Potter! We love it for a whole bunch of different reasons. But one of those reasons is that – even though it's technically a ~children's series~ – it's actually really damn clever.
Re-reading the series is always a treat, because you can spot little things in the earlier books that hint to plot points in the later ones.
Of course, there's also smaller things, like this line in Philosopher's Stone where you realise the Weasley twins are throwing snowballs at Voldemort's face.
