David has been writing since 1993, having returned to Ireland following a lengthy sojourn abroad. Since then he's published fourteen books, both fiction and non-fiction.
Several were commissioned by various publishers. Others were his own choice of subject-matter.
Here they are, in no particular order.
Combining the paranormal with Irish and American history, this is a novel that breaks new ground.
Usher's Island was David's very first novel, written in 1991 and published "somewhat" later, in 2015.
The inspiration for this novel came from a walk on Cranfield Beach, County Down, in the company of Christina McKenna in 1998.
The year was significant: two centuries before, the Irish had staged an unsuccessful rebellion against British rule. Among the leaders was a certain Henry Joy McCracken, a native of Belfast.
This was David's second commissioned work, courtesy of Gill and Macmillan, Dublin. He was asked to compile a collection of true-life Irish murder stories.
Noting that such collections tended to concentrate on male killers, David decided to explore cases involving Irishwomen who murdered for one reason or another. The first volume explored killers from Victorian times to the 1990s.
This is the follow-up to Bloody Women: Ireland's Female Killers. It was likewise published by Gill and Macmillan Dublin.
This time the murder cases range from the 1940s to the early part of the 21st century.
Book three of David's series on Irish female killers was published by Poolbeg Press, Dublin, and deals with killers of our time. They range from the notorious "Scissor Sisters" of Dublin, who killed and dismembered their victim, concealing the parts in various locations, to the "Black Widow", Catherine Nevin, who set up her husband's murder in Jack White's Inn in Wexford.
Detective Inspector Blade Macken is one of David's most controversial creations. He's a deeply flawed individual who nevertheless is a superb investigator for Dublin's elite Special Branch. In this first mystery of the series, Blade must find a bomber who threatens the forthcoming visit to Ireland of the US President.
Once again DI Blade Macken, together with his assistant, Orla Sweetman, is called in to investigate a mysterious murder, this time in Carlingford, County Louth.
Things are far from what they seem. History has reached out to thwart Blade's efforts, and some very nasty facts come to light.
Two young amateur actors find themselves transported to New York in the early Middle Ages. The city is ruled by a king, a despot of Norman descent.
This is a parallel universe, where other rules apply. Todd and Ruth must brave great odds to protect themselves and their future city.
The Devil is alive and well and living in Ireland, if we're to believe the "victims of paranormal affliction" interviewed by David and his wife, Christina McKenna.
The book is an unbiased investigation into the work of several exorcists and includes useful information related to the phenomena associated with the preternatural.
The book is an American edition of The Dark Sacrament, published by HarperOne, San Francisco. The addition of extra material set it apart from the Irish edition.
Moreover, David and Christina concentrate on the work of two Irish exorcists, one a Catholic monk, the other a Church of Ireland clergyman.
J.M. Synge is best remembered for his ground-breaking drama "The Playboy of the Western World." Inspired by three visits to the Aran Islands, off the west coast of Ireland, it caused an uproar in Dublin when first performed in 1907.
David's biography takes an unorthodox approach to the life of one of Ireland's most unorthodox dramatists.
This is a very timely novel, coming as it does exactly 100 years after the ill-fated British Army campaign in Mesopotamia, the area today known as Iraq.
It likewise marks the centenary of two of the most ruthless genocides in recent history, those perpetrated by Turkey against the Armenians and Assyrians, two Christian communities living within the borders of the Ottoman Empire.
David's collection of short stories are told very much with the tongue in cheek. Each of the ten tall tales is a wry look at a famous Irish author, ranging from Swift to Behan.
Most are pastiches of the writers' styles, and speculate what might have happened had their lives taken different turns at different times.
Faust is a well-known and notorious figure in the mythology of Europe. Each generation has had a version of the legend involving the doctor who sold his soul to a demon in exchange for wealth and power.
David's novel look at the tale explores Faust's involvement in the birth of the printing press. It's a story like no other in the genre of the paranormal.