Dedman's short stories have appeared in Year's Best Fantasy and Horror, Year's Best SF, and The Best Australian Writing: A Fifty Year Collection.

Contributing as a story editor, Dedman is also one of the team members behind Borderlands, a tri-annual Australian science fiction, fantasy and horror magazine published from Perth, Western Australia.

In 2007, he contributed to the Doctor Who short-story collection, Destination Prague.

Novels

• The Art of Arrow-Cutting (Tor, 1997)
• Shadows Bite (Tor, 2001) (sequel to The Art of Arrow-Cutting)
• Foreign Bodies (Tor, 1999)
• Shadowrun: A Fistful of Data (ROC, 2006).

Story collections

• The Lady of Situations (Ticonderoga, 1999)
• Never Seen By Waking Eyes (Prime, 2005)

Anthology contributions

• Black Box e-anthology (Brimstone Press, 2008)

Non-fiction works

• Bone Hunters: On the Trail of the Dinosaurs (Omnibus, 1998).

Chapbooks

• The Dirty Little Unicorn (Self-published, 1987)

Short stories

• "Never Seen by Waking Eyes" (1996) in F&SF (ed. Kristine Kathryn Rusch)
• "A Walk-On Part in the War" (1998) in Dreaming Down-Under (ed. Jack Dann and Janeen Webb)
• "Honest Ghosts" (1999) in Gothic.net July 1999
• "A Sentiment Open to Doubt" (2000) in Ticonderoga Online May 2000
• "Probable Cause" (2001) in Orb Speculative Fiction #2 (ed. Sarah Endacott)
• "Wastelands" (2002) in Agog! Fantastic Fiction
• "Madly" (2003) in New Australian Tales of the Supernatural (ed. Bill Congreve)
• "The Wind Shall Blow For Ever Mair" (2003) in Gathering the Bones (ed. Ramsey Campbell, Jack Dann, Dennis Etchison)
• "Twilight of the Idols" (2004) in Conqueror Fantastic (ed. Pamela Sargent)
• "Dead of Winter" (2006) in Weird Tales March-April 2006 (ed. George H. Scithers, Darrell Schweitzer, John Gregory Betancourt)

Works edited

• Consensual (co-edited)
• Consensual: the Second Coming (co-edited)
• Consensual a trois. (co-edited)

The Art of Arrow-Cutting was nominated for a Bram Stoker Award in the category of Best First Novel. In 1998 Dedman's "A Walk-On Part in the War" won the 1998 Aurealis Award for best fantasy short story. In 2001 "The Devotee" tied for the win with Terry Dowling's "The Saltimbanques" of the 2001 Ditmar Award for best short story. "Dead of Winter" won the 2006 Aurealis Award for best horror short story. Dedman has also received over 30 nominations for his work in awards such as the Aurealis Awards, Ditmar Awards, Gaylactic Spectrum Awards, the Bram Stoker Awards, and the Locus Awards.