Mark began writing poetry in 2001, and years later started to write short stories which led to the novella The Many Beautiful Worlds of Death, which was published in 2015. A short story, The Spider Web Collector, was published in a collection called "Hide It!" by Mardibooks in 2014. A second short story by Mark was published in 2016 by Earlyworks Press, with another Earlyworks book, Journeys Beyond, featuring one of Mark's paintings on the cover.

As of 2016 Mark has self-published three books with the imprint Pentangel Books; two books of illustrated poetry and a novella.

Softback

Songs of Life
William Blake & Mark Sheeky
Softback

365 Universes
Mark Sheeky
Softback

365 Universes
Mark Sheeky
Limited Edition Hardback

The Ball of the Future
Various Authors
Softback

Hide It!
Various Authors
eBook