Geason was born in 1946, New Norfolk, Tasmania, grew up in Queensland, and now lives in Sydney. She has a Bachelor of Arts in History and Politics from the University of Queensland and a Masters Degree in political theory from the University of Toronto, Canada. Most of Geason's professional life has centred on politics and writing, often a combination of both, including positions as a researcher in Parliament House, Canberra; Cabinet Adviser in the NSW Premier's Department; and head of information in what is now the Environment Protection Authority. From 1988 she worked as a freelance writer and editor, and from 1992 till 1997, was literary editor of the Sydney weekly newspaper, the Sun-Herald . In the late 1980s Geason wrote a series of crime prevention manuals for the Australian Institute of Criminology and spent two years on the Premier's Advisory Council on Crime Prevention.

Her published works include:

Shaved Fish, Allen & Unwin, Sydney 1990
Dogfish, Allen & Unwin, Sydney 1991
Shark Bait, Allen & & Unwin, Sydney 1993
Wildfire, Random House Australia, Sydney 1995
Readers Digest Select Editions, Australasia, Sydney 1997

Stories in Anthologies:
'An Old Husbands' Tale' in More Crimes for a Summer Christmas , ed. Stephen Knight, Allen & Unwin, Sydney 1991
'Aint Misbehavin' in Killing Women: Rewriting Detective Fiction (essays on feminism and the PI genre), ed. Delys Bird, Angus & Roberstson, Sydney 1993
'Conflict of Interest' in Moonlight Becomes You: Crimes for Summer 6, ed. Jean Bedford, Allen & Unwin, Sydney 1995.
'Totally Devoted' in Shadow Alley (crime for teenagers), compiled by Lucy Sussex, Omnibus Books, Sydney 1995
'Green Murder' in Women on the Case, ed. Sara Paretsky, Delacorte, NY 1996
Virago, London 1997
'Sybilla of the Fires' in Overland Vol. 138, Autumn 1995.

Short Stories in Australian Penthouse; Billy Blue Magazine; Sun-Herald Newspaper; Tages Anzeiger, Zurich; Australasian Post Magazine

Non-Fiction:
Crime Prevention: Theory & Practice; Crime Prevention Through Environmental Design; Preventing Car Theft; Preventing Graffiti & Vandalism; and Preventing Retail Crime, Australian Institute of Criminology, Canberra 1988-1991
Regarding Jane Eyre, ed. Susan Geason, Vintage/Random House, Sydney 1997
Great Australian Girls, ABC Books, North Sydney 1999

Audiotapes:
Fish Tales, based on Shaved Fish, ABC Audio Crime Fiction Series, 1993

Sources used to compile this entry: Papers of Susan Geason, c. 1995 - 2000; Private Hands (contact Australian Women's Archive Project).