Peek's short stories have been published in a variety of genre magazines, including Fantasy Magazine and Aurealis. His fiction has been reprinted in various Year's Best volumes. In 2000, he created a zine called The Urban Sprawl Project, a black and white pamphlet of photography and prose, and this remains the name of his online journal. In 2006 his autobiography, Twenty-Six Lies/One Truth, was published by Wheatland Press with artwork from Andrew Macrae and Anna Brown. In 2007, Black Sheep, a dystopian novel, was published by Prime Books. In 2007, Peek also began collaborating with Artist Anna Brown on Nowhere Near Savannah, an online comic that in part follows on from their original collaboration on Twenty-Six Lies/One Truth. Peek has claimed that every incident described in Nowhere near Savannah is true.

Peek holds a Bachelor of Arts (Hons) from the University of Western Sydney, and a PhD in Creative Writing from the University of New South Wales, during which he wrote the novel A Year in the City. His reviews have appeared on several websites including, PopImage, Sequential Tart, and Strange Horizons. In 2005 he interviewed over forty Australian speculative fiction Writers, editors and publishers as part of The 2005 Snapshot: Australian Speculative Fiction.