GI Brides: The Wartime Girls Who Crossed the Atlantic for Love is a bestselling book by Duncan Barrett and Nuala Calvi, authors of The Sugar Girls. It was published by HarperCollins on 29 August 2013.The book tells the true stories of four British GI Brides, women who married American servicemen stationed in their country during the 'friendly invasion' of the Second World War. It is based on interviews with them, but written in a narrative style.