Great A’Tuin, the giant star turtle swims through space. On his back stand four elephants. On their backs sit the Discworld. The Discworld is a flat Earth, where forces of magic and fantasy play across the land.

The third in Pratchett’s “witches” series, Lords & Ladies begins with the return of Granny Weatherwax and her coven — Nanny Ogg, and Magrat Garlick — to the Kingdom of Lancre, after another adventure.

For years, the Elves — far from the pleasant creatures of fairytale — have been kept at bay … until now. Led by their evil queen and with the barrier between worlds weakening, how can our spell-casting, potion-mixing, pointy hat-wearing trio possibly defend the land from such terror?