A Hat Full of SkyThe second book in the Tiffany Aching series five Discworld novels by master storyteller Terry Pratchett. 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.