Wyrd Sisters

"Three witches on a lonely heath. A king cruelly murdered, his throne usurped by his ambitious cousin. A child heir and the royal crown, both missing. The witches in Discworld don't have these kinds of problems-because they don't like being bossed about. They do, however, have Granny Weatherwax, the most highly regarded non-leader of their non-social coven. But when the future of the Discworld is at stake, Granny Weatherwax, Nanny Ogg, and Margat Garlick form an unlikely alliance to save a prince and restore him to the throne of Lancre. As they learn, though, it's far more complicated to stir up trouble in a castle than a certain Bard would have it, even when you've got a few unexpected spells up your sleeve. The Discworld novels can be read in any order but Wyrd Sisters is the second book in the Witches series"--