In March 2022 Parkinson published a jointly authored collection of poetry with Dave Lordan, Back To Normal (Front Line Press).
In July 2022 Front Line Press published Parkinson's first collection of short stories, The Grind.
In 2016, New Binary Press published Parkinson's debut novel, The Blocks, inspired by the author's childhood in a troubled part of inner-city Dublin.
[4][5] Aiden O'Reilly writes in The Irish Times that "Parkinson has set himself up unashamedly and without irony as a singer of the human soul in its contrary states of degradation and exaltation".
[6] Parkinson grew up in O'Devaney Gardens,[3] described as "one of Dublin’s most troubled and dilapidated complexes".