Witches abroad by Terry Pratchett - Discworld book n. 12

Amazing, fantastic, a must. It's genius!!! This book is so great, I'm always amazed at how incredible Terry Pratchett is at writing!
The story is simple. There's a problem in the distant city of Genua, and it'll be our witches Granny Weatherwax, Nanny Ogg and Magrat Garlick's duty to sort it out! Want to know more? There were two fairy godmothers, Desiderata and Lilith. Lilith wished for this girl in Genua to have beauty and power and marry a prince, and now she's changing a whole country just to make a story work! And Desiderata can see bits of the future, and knows that she has to send the three witches there.
This whole book is fantastic, so full of amazing lines that I'd like to tell you, but I'm afraid that could turn out to be too long.
made me laugh, and it does Pratchett honor that he didn't forget even a little bit like this, not central to the plot at all, and probably thought that with all those Glods around, we were bound sooner or later to meet a Glod ourselves, so one of the protagonist of the book "soul music" will be a Glod! 
They were: never trust a dog with orange eyebrows, always get the young man's name and address, never get between two mirrors, and always wear completely clean underwear every day because you never knew when you were going to be knocked down and killed by a runaway horse and if people found you had unsatisfactory underwear on, you'd die of shame. And then Desiderata grew up to become a witch. And one of the minor benefits of being a witch is that you know exactly when you're going to die and can wear what underwear you like. Which explains a lot about witches.> it actually does, and it's the reason why I love Discworld witches so much!!!