A number of his stories have been printed multiple times due to his habit of resubmission – for instance, "Isle of the Dancing Dead" and "The Battle of Leila the Dog".

Another continuing character in his work is the lesbian "trained killer for the state" Cy De Gerch, the heroine of his novel Presumed Dead and the collection Thirty Minutes for New Hell.

Several stories by Kennett including "Out of the Storm", his story from the Terror Australis anthology, have been produced as audio productions at The Dunesteef Audio Fiction Magazine: [2] He has collaborated on occasion with other Australian writers of horror, for instance Barry Radburn, Paul Collins and Bryce J. Stevens.

The St James Guide to Horror, Ghost and Gothic Writers points out that Kennett is "really the one Australian writer to have produced a substantial body of work in the ghost-story field" – while Rob Hood and Terry Dowling have also produced significant quantities of ghost stories, Kennett's concentration on the genre makes him the leading specialist in Australia.

Reggie Oliver, reviewing 472 Cheyne Walk: Carnacki, the Untold Stories, has called Kennett "prodigally inventive" and Peter Worthy of Black Book webzine has called the book "a dazzling continuation of William Hope Hodgson's Carnacki the Ghost-Finder" Kennett worked as possibly the longest-serving motorbike courier in Australia.