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 by Mardibooks in 2014. A second short story by Mark was published in 2016 by Earlyworks Press.
Books that include Mark's illustrations include Testing The Delicates by Deborah Edgeley (Ink Pantry Publishing), Journeys Beyond (Earlyworks Press), Diversifly (Fair Acre Press).
Mark has self-published three books with the imprint Pentangel Books; two books of illustrated poetry and a novella.