Brian O'Sullivan


Brian O'Sullivan was born in county Cork, Ireland. On completing a degree at University College Cork, he went on to travel extensively. He is now based in New Zealand with his family but returns to Ireland on a regular basis. He writes weekly articles on Irish Folklore or on his writing at his website which can be found at: or on the Irishimbasbooks Facebook page.

Brian writes fiction that incorporates strong elements of Irish culture, language, history and mythology. These include literary short stories (The Irish Muse collection), mystery thrillers (The Beara Trilogy) and a contemporary version of the Fionn mac Cumhaill/ Fenian legends (The Fionn mac Cumhaill Series).

Although he writes predominantly for an Irish audience, Brian's unique style and humour has meant that his books have become firm favourites of readers all around the world.

The fourth book in the Fionn mac Cumhaill Series (Fionn: The Adversary) was released on February 2017.

Brian has also edited and provided cultural context for 'The Celtic Mythology Collection' - a series of short story collections based on elements of Celtic cultural mythology. The most recent in the series was released in March 2017.

Where to find Brian O'Sullivan online


Fionn mac Cumhaill
The Fionn mac Cumhaill series is a series of Irish mythological and adventure novels based around some of the early events outlined in Macgnímartha Finn (The Boyhood Deeds of Fionn). An exciting contemporary version of a narrative that’s almost a thousand years old, it recounts the adventures of Fionn during his upbringing at Ráth Bládhma and of the people who protected him there (his aunt Bodhmhall, the woman warrior Liath Luachra, Fiacail mac Codhna and Muirne Muncháem). Despite being a work of historical fiction, the series aligns completely with the original 12th century manuscript on which it is based.


The Pursuit
Price: $0.99 USD. Words: 12,020. Language: English. Published: July 21, 2017 by Irish Imbas Books. Categories: Fiction » Fantasy » Dark, Fiction » Fantasy » Historical
A pursuit across the Great Wild to rescue an abducted woman leads to bloody complication for the woman warrior Liath Luachra.
Fionn: The Adversary (The Fionn mac Cumhaill Series #3)
Series: Fionn mac Cumhaill. Price: $4.99 USD. Words: 119,210. Language: English. Published: February 28, 2017 by Irish Imbas Books. Categories: Fiction » Fantasy » Historical, Fiction » Fantasy » Epic
Ireland 198 A.D. The Ráth Bládhma allies have been decimated, the ragged survivors strung along the banks of an isolated river valley. Seeking refuge at the fortress of Dún Baoiscne, druidess Bodhmhall must confront her turbulent history and her scheming father to unearth the identity of the mysterious Adversary. But the woman warrior Liath Luachra, has a far more direct approach in mind.
Liath Luachra: The Grey One
Price: $4.99 USD. Words: 94,980. Language: English. Published: March 10, 2016 by Irish Imbas Books. Categories: Fiction » Fantasy » Historical, Fiction » Historical » Ancient
Ireland 188 A.D: A land of tribal affiliations, secret alliances and treacherous rivalries. Youthful woman warrior Liath Luachra has survived two brutal years fighting with mercenary war party “The Friendly Ones” but now the winds are shifting. Dispatched on a murderous errand where nothing is as it seems, she can count on nothing but her wits and her natural ferocity to see her through.
Fionn: Traitor of Dún Baoiscne (The Fionn mac Cumhaill Series #2)
Series: Fionn mac Cumhaill. Price: $4.99 USD. Words: 93,790. Language: English. Published: January 9, 2015 by Irish Imbas Books. Categories: Fiction » Fantasy » Historical, Fiction » Historical » Ancient
Based on the ancient Irish Fenian Cycle texts, this continues the fascinating tale of Ireland’s greatest hero, Fionn mac Cumhaill. Six years have passed since the brutal attack on the community of Ráth Bládhma. The isolated valley of Glenn Ceoch is at peace once more but those who survived still bear the scars of that struggle. Now, old and new enemies threaten the settlement.
Fionn: Defence of Rath Bladhma (The Fionn mac Cumhaill Series #1)
Series: Fionn mac Cumhaill. Price: $4.99 USD. Words: 104,290. Language: English. Published: May 21, 2014 by Irish Imbas Books. Categories: Fiction » Historical » Ancient, Fiction » Fantasy » Historical
Ireland: 192 A.D. Inter-tribal conflict has set the country on edge. In the secluded valley of Glenn Ceoch, disgraced druidess Bodhmall and her lover Liath Luachra have successfully avoided the bloodshed for many years. Now, the arrival of a pregnant refugee means they must fight to survive a mysterious war party and a ruthless magician intent on murder.
Fionn: The Stalking Silence
Price: Free! Words: 34,920. Language: English. Published: March 9, 2014 by Irish Imbas Books. Categories: Fiction » Fantasy » Historical, Fiction » Adventure » Action
Ireland 192 AD: A pregnant refugee fleeing through the wilderness encounters a relentless predator. Only by drawing on all her courage and cunning can she hope to survive.
The Irish Muse and Other Stories
Price: $4.99 USD. Words: 37,260. Language: English. Published: March 4, 2014 by Irish Imbas Books. Categories: Fiction » Anthologies » Short stories - single author, Fiction » Literature » Literary
An intriguing collection of short stories from Irish author Brian O'Sullivan, this provides an original twist on foreign and familiar territory by merging the passion and wit of Irish storytelling with the down-to-earth flavour of different international locations.
The Ringmaster's Daughter
Price: $0.99 USD. Words: 6,260. Language: English. Published: March 3, 2014 by Irish Imbas Books. Categories: Fiction » Fantasy » Urban, Fiction » Women's fiction » General
A young Irish woman fleeing a dreary existence encounters Dal, a mysterious ringmaster’s daughter. Strikingly beautiful and exceptionally unconventional, she is too implausible to be true – despite all evidence to the contrary. A unique and intriguing tale of magic, lies and female friendships by Irish author Brian O'Sullivan.
Beara: Dark Legends
Price: $6.99 USD. Words: 168,310. Language: English. Published: February 28, 2014 by Irish Imbas Books. Categories: Fiction » Thriller & suspense » Action & suspense, Fiction » Mystery & detective » Historical
Reclusive Irish historian Muiris (Mos) O’Súilleabháin has a “sixth sense for history, a unique talent for finding lost things”. Hired to locate the final resting place of legendary Irish hero, Fionn mac Cumhal, Mos must draw on his knowledge of Gaelic lore to solve a thousand year old mystery, outwit a lethal competitor and survive his own unusual family history.

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