Tiffany Aching, the young witch from The Wee Free Men, A Hat Full of Sky, and Wintersmith is back in a new adventure featuring Discworld characters both familiar to fans (such as Tiffany, the Wee Free Men, Granny Weatherwax and Nanny Ogg) and new (meet Wee Mad Arthur, the Nac Mac Feegle on the City Watch whose only previous appearance was a brief cameo in Feet of Clay, and city witch Mrs Proust - a fabulous Pratchett creation).

Oh, and there's a magic book or two, a twist through time, a Cunning Man - and a Giant Man of chalk....