Which books are told in the most interesting / creative/ mind bending ways? How does it add to the book overall?
My all time favourite is Ella Minnow Pea where the book is a series of letters. The characters have to think of more inventive ways to write their letters as an increasing number of letters are outlawed as the book progresses.
Honourable mentions include:
Maribou Stork Nightmares where the narrator is trying to suppress his dark past by allowing himself to slip into hallucinations of a whacky south African safari adventure.
Flowers for Algernon where the narrator becomes more articulate by taking part in a scientific experiment.
Ursula le Guin often used science reports to break up the prose and add additional context, which I think makes the story richer. Particularly in the Left Hand of Darkness - an entire chapter towards the middle is a science report on the physiology of the Gethens, and honestly it’s much needed context since their biology is so different.
This reminds me of Frank Herbert’s Dune where the chapters are broken up by journal entries by the Princess Irulan.