Ten little witches - Paul Ruditis

When Sabrina's friend Harvey gets a mysterious invitation for himself and a guest to an Other Realm Halloween Party, what better witch to party with than Sabrina Spellman? But as Harvey is the only mortal who knows about Sabrina's witchiness it's obvious that something's amiss! Even Salem, the master of dastardly tricks can't figure it out! So Sabrina decides that she'd better go along just in case. But this turns out to be no ordinary Halloween party - the mysterious host is nowhere to be found and the motley crew of partygoers are fast disappearing, one by one! Sabrina doesn't know who would ruin a witch's favourite day, but she's determined to get to the bottom of this mystery ... before she's the last witch standing.