The 6th book in the fun series which will appeal to fans of Mr Gum, Barry Loser and Tom Gates. Agatha and her friends don't believe in ghosts, but who is ringing the bell in the school clock tower? and who's is that horrible glowing face at the window? They decide to spend a night in the school hall, keeping watch, and that's when things get even stranger! Illustrations by David Tazzyman. Ages: 7+