Catherine Ryan Howard is the author of 56 Days, which was an overall No. 1 bestseller in Ireland and a Kindle top ten bestseller, as well as winning Crime Fiction Book of the Year at the Irish Book Awards 2021, and The Nothing Man, which shot straight to the top of the Irish bestseller charts on publication, was a Kindle No. 1 bestseller in the UK and was shortlisted for the Ian Fleming Steel Dagger. 

Her work has been shortlisted for the CWA John Creasey/New Blood Dagger and the Mystery Writers of America Edgar Award for Best Novel, and longlisted for the Dublin Literary Award 2023. She lives in Dublin.