Jo Spain is the author of thirteen bestselling thrillers, including her three No.1s, The Trial (Ireland), The Confession (Ireland) and Dirty Little Secrets (Audible). She is translated into seventeen languages and was nominated as Irish author of the year in 2024.

Jo is also a full-time screenwriter. Along with her writing partner, David Logan, she has been commissioned for the fifth season of Harry Wild, a series they showrun, co-write and executive produce, starring Jane Seymour. Jo and David also co-wrote and exec produced 2024's The Boy That Never Was, and showran and wrote Mix Tape, which has already won the audience choice award at SXSW, the prestigious U.S. festival, which launched Hacks and Beef.

Jo is currently adapting Emma Curtis' novel Invite Me In for RTE as well as her own, The Trial, with Metropolitan Pictures (Wednesday/The Banshees of Inisherin/The Tourist). Her books Don't Look Back and The Last to Disappear are also in development.