Having been a fan of Discworld since I was old enough to read them, this follows the usual Discworld style, which of course is a great thing.
If you buy this one wondering what it's about, perhaps you should stop now. This entire book centres around poo, as the name would suggest. Without spoiling the story, it's obsessively poo themed. But it's done in a typical, charming Discworld way. There are also illustrations in this one! How nice! My Kindle (3G + Keyboard) displays this perfectly well, too.
As a final note, this is also an incredibly short book compared to some previous Discworld novels.
Make what you will of it, as it is a charmingly well written book all about poo. Now, if you will excuse me, I must go wash my hands.