It begun as a sudden strange fancy...Polly Perks had to become a boy in a hurry. Cutting off her hair and wearing trousers was easy. Learning to fart and belch in public and walk like an ape took more time. And now she's enlisted in the army and searching for her lost brother. But there's a war on. There's always a war on. And Polly and her fellow recruits are suddenly in the thick of it, without any training, and the enemy is hunting them.

Sam Vines is a man on the run. Yesterday, he was a duke, a chief of police, and an ambassador. Now he has nothing but his native wit and the gloomy trousers of Uncle Vanya. And if he can't make it through the forest to civilisation, there's going to be a terrible war. But there are monsters on his trail. They're werewolves - and they're catching up. Sam Vimes is out of time and already out of breath....

To the consternation of the patrician, Lord Vetinari, a new invention has arrived in Ankh-Morpork - a great clanging monster of a machine that harnesses the power of all of the elements: earth, air, fire and water. This being Ankh-Morpork, it’s soon drawing astonished crowds, some of whom caught the zeitgeist early and arrive armed with notepads and very sensible rainwear.

Cameras roll - which means the imps inside have to paint really fast - on the fantastic Discworld when the alchemists discover the magic of the silver screen. But what is the dark secret of Holy Wood hill? As the alien clichés of Tinsel Town pour into the world, it's up to the Disc's first film stars to find out.

Suddenly, condemned arch-swindler Moist von Lipwig found himself with a noose around his neck and dropping through a trapdoor into...a government job? By all rights, Moist should be meeting his maker rather than being offered a position as postmaster by Lord Vetinari, supreme ruler of Ankh-Morpork.

It is a truth universally acknowledged that a policeman taking a holiday would barely have had time to open his suitcase before he finds his first corpse. And Commander Sam Vimes of the Ankh-Morpork City Watch is on holiday in the pleasant and innocent countryside, but not for him a mere body in the wardrobe. There are many, many bodies and an ancient crime more terrible than murder. He is out of his jurisdiction, out of his depth, out of bacon sandwiches and occasionally snookered and out of his mind, but never out of guile. They say that in the end all sins are forgiven.

A weathercock has risen from the sea of Discworld and suddenly you can tell which way the wind is blowing. A new land has surfaced and so have old feuds. And as two armies march, Commander Vimes of Ankh-Morpork City Watch has got just a few hours to deal with a crime so big that there's no law against it. It's called 'war'.

It's an offer you can't refuse. Who would not wish to be the man in charge of Ankh-Morpork's Royal Mint and the bank next door? It's a job for life. But, as former con-man Moist von Lipwig is learning, the life is not necessarily for long. The Chief Cashier is almost certainly a vampire. There's something nameless in the cellar (and the cellar itself is pretty nameless), and it turns out that the Royal Mintruns at a loss.

Koom Valley? That was where the trolls ambushed the dwarfs, or the dwarfs ambushed the trolls. It was far away. It was a long time ago. But if he doesn't solve the murder of just one dwarf, Commander Sam Vimes of Ankh-Morpork City Watch is going to see it fought again, right outside his office.

Who's murdering harmless old men? Who's poisoning the Patrician? As autumn fogs hold Ankh-Morpork in their grip, the City Watch has to track down a murderer who can't be seen. Maybe the golems know something - but the solemn men of clay, who work all day and night and are never any trouble to anyone, have started to commit suicide....

Up on the chalk downs they call The Wold, witches are banned - ever since the Baron's son vanished in the woods. Anyway, as all witches know, chalk's no good for magic. Nine-year-old Tiffany Aching thinks her Granny Aching - a wise shepherd - might have been a witch, but now Granny Aching is dead and it's up to Tiffany to work it all out when strange things begin happening.

The Ankh-Morpork Post Office is running like...well, not at all like a government office. The mail is delivered promptly. Postmaster General Moist von Lipwig, former arch-swindler and confidence man, has exceeded all expectations - including his own. So it's somewhat disconcerting when Lord Vetinari summons Moist to the palace and asks, "Tell me, Mr. Lipwig, would you like to make some real money?"

Time is a resource. Everyone knows it has to be managed. You mess with it at your peril. You can let it move fast or slowly, but what you mustn't do is allow it to stop. The Monks of History have the glamorous job of time management in the Discworld. They store it and pump it from the places where it's wasted (like underwater—how much time does a codfish need?) to places like cities, where there's never enough time. But the construction of the world's first truly accurate clock starts a race against, well, time for Lu Tze and his apprentice Lobsang Ludd.

Vampires have come to Lancre, but they're not what you'd expect. Sure, they drink blood and view humans as dinner, but they're modern and sophisticated. They've got style and fancy waistcoats. And they're not a bit afraid of garlic. The Magpyr family are out of the casket and want a bite of the future. But they haven't met the neighbours yet. Between them and Lancre stand a coven of four - Granny Weatherwax, Nanny Ogg, Magrat and young Agnes - and they don't take kindly to murderous intruders....

Sir Terry Pratchett's final Discworld novel, which features the witch Tiffany Aching.