Giant's Bread is a novel by British writer Agatha Christie, first published in the UK by Collins in April 1930 and in the US by Doubleday later in the same year. The UK edition retailed for seven shillings and sixpence (7/6) and the US edition at $1.00. The dust jacket of the first UK edition was by the artist Margaret Macadam. Giant's Bread is the first of six novels Christie published under the pen name "Mary Westmacott".