thumb|link=Hallowe'en Party is a work of detective fiction by Agatha Christie and first published in the UK by the Collins Crime Club in November 1969 and in the US by Dodd, Mead and Company later in the same year. The UK edition retailed for twenty-five shillings. In preparation for decimalisation on February 15, 1971, it was also priced on the dustjacket at £1.25. The US edition retailed at $5.95.