Jo Callaghan’s second book definitely did not suffer from sophomore slump. I thought Leave No Trace was even better than In The Blink of an Eye and I loved it. Not only was Leave No Trace a super police procedural, but this time Kat and Locke were in charge of a live case involving a sadistic and ritualistic murder, which made it hard to put down. Once again Callaghan shows us how extremely helpful data analysis by AI could be, but also how instinct and an understanding of human emotions by another human was essential.