This is the ninth title in this fab and fun series.
Ally's not normally superstitious, but something freaky's happening in Crouch End. She knows her home is usually a complete madhouse, but lately it's even madder - paintings upside down, milk turning green, Winslet appearing as a ghostly apparition, covered in kitchen towel.
Then there are the noises at night - so spooky even Linn was scared enough to jump in Dad's bed with Tor, Ally and Rowan, and it's not just the creaky plumbing this time! Ally's got to get to the bottom of this, but something's got her even more spooked - whatever's going on between Billy and . . . Sandie?