Harry Potter film series, The Goblet of Fire.
Hogwart's is host to a very dangerous international tournament amongst the Wizards & Witches world, while the gang first encounters puberty (Ron is hilariously revealed to be an ass-man), firmly graduating the series from children's films to young-adult oriented in both subject matter and tone. The series gets darker with each installment but Newell manages to insert enough humor to keep it fun enough amidst the doom 'n gloom. Like always the adult stars are a joy to watch as they have a grand ol' time getting into their quirky roles but it's the kids that make a vast improvement from the last film with their emotional acting chops. At least half of the novel is left out but doesn't matter seeing as it still fits like a glove in the series without missing any important story arcs leading into the future films.
4 PULPy Radioheads out of 5