He has published several books of poetry on regions of Australia such as the Great Barrier Reef and the Blue Mountains, often collaborating with renowned nature photographers. Mark's work is widely represented in contemporary Australian anthologies of poetry, and in international publications. For instance, in the fifth edition of Oxford University Press's massive international chronological anthology Seven Centuries of Poetry in English (edited by J. Leonard, ISBN 0 19 551420 3) he is allocated more space than any poet under the age of Seamus Heaney.