Tui T. Sutherland (born July 31, 1978 in Caracas Venezuela) is a writer of children's novels. In addition to her real name, she has also written under the pen names Heather Williams, and Erin Hunter, working with Victoria Holmes, Cherith Baldry, and Kate Cary to write the "Warriors". As Erin Hunter, she has mainly contributed to the "Seekers" series, and the "Warriors" "Field Guides".