Creaking floorboards, spooky spectres, things that go bump in the night. Are you brave enough to go on a ghost hunt...? Olly Spellmaker wears leathers, cooks up spells, rides a motorbike...and is old enough to be Alex's granny. Much as he likes her, she can be so irritating. Right now, for example, she needs Alex's help and she won't take no for an answer. She needs to find some ghosts to haunt a disturbingly unscary house and Alex is boy who can 'twingle' - or sense spectres. The problem is, he doesn't know what sort until they've materialised. And a soggy White Lady, a complaining Green Lady and a grungy, grey blob who does nothing but hang there aren't quite what Olly had in mind...