Geoff Armstrong is the author of the centenary histories of the Sheffield Shield and St George rugby league, and the definitive biography of Phar Lap. He has written or edited several notable cricket books, including titles by Steve Waugh, David Boon, Bob Simpson and Mike Whitney, and produced books with many well-known sporting identities, including Wayne Bennett, Anna Meares, Mal Meninga and Ralph Doubell. He has produced the annual SCG Members Diary for the last 10 years, and among the books he has published are Richie: The Man Behind the Legend, a tribute to Richie Benaud; Bronzed, the story of the Sydney Cricket Ground's Basil Sellers Sports Sculptures Project; and Andrew Webster's If These Walls Could Talk: A Celebration of the Sydney Cricket Ground. His most recent two-volume work, A Thing of Beauty: The Founding of the Sydney Cricket Ground 1851-1898, has been described as 'a definitive history' of the venue.