The Witches Trilogy(1994)

Cristina MacíaTerry Pratchett

Witches are not by nature gregarious and they certainly don't have leaders.

Granny Weatherwax was the most highly regarded of the leaders they didn't have...

Here are three novels featuring one of Terry Pratchett's most celebrated
characters, along with her sidekicks, the fertile Nanny Ogg and the New Age's
favourite witch, Magrat Garlick:

EQUAL RITES

Women aren't supposed to be wizards — but nobody told Eskarina, the eighth daughter of an eighth son, when she inherited her father's staff, and with Granny Weatherwax's reluctant help she sets out to learn her new calling.

WYRD SISTERS

In which Granny discovers that meddling in royal politics is a lot more difficult than certain playwrights would have you believe.

WITCHES ABROAD

The funniest Grand Tour anywhere, as Granny, Nanny and Magrat travel to distant Genua — to make sure a servant girl doesn't marry the prince.