Tiffany Aching is going ''into service'': to be a lady, no less, a maid in a big house. At least, this is what she tells her parents.Really, Tiffany is going away to learn magic.But making friends with fellow witches is always difficult when an invisible-being-that-cannot-be-killed takes over your body - stealing money, and threatening violence.Tiffany must use all her witchy cunning to reclaim what''s hers. Luckily, she has a bit of help. What''s tiny, Scottish and blue all over? A Nac Mac Feegle of course - the rudest type of fairy, and handy to have in a tight spot . . .''Oodles of dry wit, imagination and shrewdly observed characters''Independent on Sunday