Great premise and what an opening! My heart was in my mouth from the start. “Witness X” is an at times brutal, gory, creepy, genre bending psychological thriller. Protagonist Kyra has invented technology that she hopes can be used to improve the efficiency of the criminal justice system. SE Moorhead’s imagination and attention to detail are exemplary, with lots of interesting observations on what life might be like in the not-too-distant future. She has spawned a range of plausible technology including virtual holidays, newspops, computer auto-logging of police briefings and injectable bio-trackers. Personally I hope that the expensive Thames Estuary wine was a dig at Brexit! The story unfolds from the point of view of Kyra, with interjections from the killer’s perspective. I thought it was an exciting, fast-paced read and would love to see it optioned for film or television.