Gregory has also published a series of books about the Plantagenets, the ruling houses that preceded the Tudors, and the Wars of the Roses. Her first book "The White Queen", published in 2009, centres on the life of Elizabeth Woodville the wife of Edward IV. "The Red Queen", published in 2010, is about Margaret Beaufort the mother of Henry VII and grandmother to Henry VIII. "The Lady of the Rivers" (2011), is the life of Jacquetta of Luxembourg, mother of Elizabeth Woodville. "The Kingmaker's Daughter", published in 2012, is about Anne Neville, the wife of Richard III, and "The White Princess" (2013) centres on the life of Elizabeth of York, wife of Henry VII and the mother of Henry VIII. The latest work is the 2017 novel "The Last Tudor". The 2013 BBC One television series "The White Queen" is a 10-part adaptation of Gregory's novels "The White Queen", "The Red Queen" and "The Kingmaker's Daughter" (2012).