Maskerade

It has been some time since the witch trio of Granny Weatherwax, Nanny Ogg and Magrat Garlick became a duo. And since everyone knows witches have to come in threes, Granny and Nanny start looking for a replacement. Only the replacement doesn't wish to become a witch and runs away to Ankh-Morpork to pursue her opera carrier.

As if having two witches on her tail was not enough, Agnes, the intended replacement, also goes through a hard time at the Opera. Not only does she have to sing in stead of inept Christine, whose looks are the only thing that keeps her employed, but she also runs into the Ghost (now now, did you think the famous Opera of Ankh-Porpork would not have its Ghost ?) ...