Wyrd Sisters

Wyrd Sisters is Terry Pratchett's sixth Discworld novel, published in 1988, and re-introduces Granny Weatherwax of Equal Rites.

Wyrd Sisters features three witches: Granny Weatherwax; Nanny Ogg, matriarch of a large tribe of Oggs, who owns the most evil cat in the world, (Greebo); and Magrat Garlick, the junior witch, who firmly believes in occult jewellery, covens and bubbling cauldrons, much to the annoyance of Granny Weatherwax and Nanny Ogg.

King Verence I of Lancre is murdered by his cousin, Duke Felmet, and the King's crown and a baby are given by an escaping servant to the three witches. The witches hand the crown and the child to a troupe of traveling actors, acknowledging that destiny will eventually take its course and Tomjon will grow up to defeat Duke Felmet.

However, the kingdom is angry and doesn't want to wait 15 years so the witches move it forward in time. Meanwhile, the duke has decided to get a play written and performed that is favourable to him so he sends the jester to Ankh-Morpork to recruit the same travelling (now stationary) company that Tomjon is in.

The only problem is that Tomjon does not want to be king. Luckily, the jester turns out to be his brother and he becomes king instead.