Herbert Homes and The Picts Book of Spells

'Herbert, are you sure you left it here' asked his one and only friend Rob, 'because if you did then it's not here now, is it' 'Blind I'm not, so if it's not here then someone must have either borrowed it or we have a no-good thief in our midst, so who do you think that could be' was what Herbert wanted to know. So what was it and would they find it before they and the entire universe went boom-bang-boom.