This is book number 6 in the Discworld series.
Terry Pratchett’s fantasy classic Wyrd Sisters, a novel in the bestselling Discworld series, is the story of Granny Weatherwax, the most highly regarded non-leader a coven of non-social witches could ever have.
Generally, these loners don't get involved in anything, mush less royal intrigue. but then there are those times they can't help it. As Granny Weatherwax is about to discover, though, it's a lot harder to stir up trouble in the castle than some theatrical types would have you think. Even when you've got a few unexpected spells up your sleeve.
Granny Weatherwax teams with two other witches—Nanny Ogg and Margat Garlick—as an unlikely alliance to save a prince and restore him to the throne of Lancre, in a tale that borrows—or is it parodies—some of William Shakespeare's best-loved works.
Terry Pratchett was the acclaimed author of the global bestselling Discworld series, the first of which, The Color of Magic, was published in 1983. In all, he was the author of more than fifty bestselling books which have sold more than 100 million copies worldwide. His novels have been widely adapted for stage and screen, and he was the winner of multiple prizes, including the Carnegie Medal for his young adult novel, The Amazing Maurice and His Educated Rodents. He was awarded a knighthood by Queen Elizabeth II for his services to literature in 2009, although he always wryly maintained that his greatest services to literature was to avoid writing any. He lived in England and died in 2015 at the age of sixty-six.