Catherine Ryan Howard was born in Cork, Ireland. Her debut thriller, Distress Signals, was an Irish Times and USA Today bestseller and was short-listed for the Crime Writers' Association John Creasey New Blood Dagger and the Irish Crime Novel of the Year. Her second novel, The Liar's Girl, was a finalist for the 2019 Edgar Award for Best Novel. She lives in Dublin.

Patrick Taylor, M.D., was born and raised in Bangor County Down in Northern Ireland. After qualifying as a specialist in 1969, Dr. Taylor worked in Canada for thirty-one years. He now divides his time between Canada and Ireland.

John Keating's numerous acting credits include Roundabout Theatre's production of Juno and the Paycock and La Mama ETC's production of Cat and the Moon, as well as various parts with the Irish Repertory Theater and the Irish Arts Center. He is a regular performer with the Independent Shakespeare Company and can also be seen in the HBO original mini-series John Adams, starring Paul Giamatti and Laura Linney. John's audiobook narrations have earned Earphone Awards and an Audie nomination. Most notably, he's read Eoin Colfer's Airman, Avi's The Traitors' Gate, and Jenny Nimmo's The Snow Spider. He also lent his voice to many of Patrick Taylor's Irish Country audiobooks.