Michael Carroll was born in Dublin, Ireland, in 1966.
He left school at the age of sixteen to work as a postman. During this time he taught himself computer programming and, at the age of nineteen, left the post office and joined a software company. He remained in the computer industry throughout the nineties, writing in his spare time.
In 1987 he joined the Irish Science Fiction Association and was soon invited to become editor of their fiction magazine FTL. He has been a member of the executive committee of the Irish Writers' Union and spent two years as editor of their regular newsletter Final Draft.
He now writes full-time, having published a number of science fiction, fantasy and romance novels in Ireland, the UK and the US.
In addition to his novels, he has published many award-winning short stories and articles, and continues to contribute regular articles, stories and graphics to newspapers, science fiction and fantasy magazines (including SFX, First Contact, The Brentford Mercury, Albedo 1, Phase), comics (including 2000 AD, Judge Dredd Megazine, Solar Wind, FutureQuake, Zarjaz) and a number of prominent websites.
In 2000, his short story "Uneven Ground" was selected to appear in Seekers, a school textbook published by the Educational Company of Ireland.
His work has been translated into French, German, Italian, Swedish and Polish. He has also written and performed plays for stage and radio.