Lentsoe la sehlooho Coven

Agatha Harkness gathers a coven of witches and sets off down, down, down The Witches' Road.

When Duke Felmet murders King Verence and takes over the small country of Lancre on the Discworld, a trio of witches—the flowery Magrat Garlick, the lively Nanny Ogg, and their leader Granny Weatherwax—are involuntarily tasked with protecting the king's infant son.