 "The Magician's Nephew" is a prequel to the series.The middle third of the novel features the creation of the Narnia world by Aslan the lion, centred on a section of a lamp-post brought by accidental observers from London in 1900.The visitors then participate in the beginning of Narnia history, 1000 years before "The Lion, the Witch and the Wardrobe" (which inaugurated the series in 1950).