This is what I call clever story building style. Written from a question asked by Matt Haig's 6 year old son about how was Father Christmas when he was a boy. It is amazing to see how he infused the actual facts about father Christmas (chimneys,where the magic came from, why he became a gift giver, the sleigh and even the laughter of Santa) as either part of the plot or immersive world building into this story. I couldn't help but give five stars!