A headmistress is dead. The circumstances are suspicious. And as every parent knows, being on the school group chat can be murder... As educators go, Claudia Stitchwell makes Miss Hannigan look like Miss Honey. But when the reviled headteacher drops dead in the school hall, a group of sceptical parents suspect the nut allergy explanation doesn't add up - they believe someone wanted to teach Miss Stitchwell a lesson. Only four people could have killed Stitchwell: Hattie, the adored school cook; Kiera, the hard-working teaching assistant; Clive, the loathed school bursar and Ben, the popular deputy head. All of them are liars... but only one is the murderer. Piecing together evidence from the daily drama and drudgery of the parents' group chat, local press, police reports, school newsletters, and good, old-fashioned gossip, the determined detective parents are doing their homework to crack the case. Will you spot the clues? Can you deduce whodunnit? And for the love of all things holy, does anyone have this week's spellings?