Lou Boldt has been featured in six other novels by Pearson. The first, Undercurrents (1988), introduces Boldt and Daphne Matthews as cops and as lovers as they try to solve a series of grisly murders. In The Angel Maker (1993), Boldt is no longer working as a cop, but Daphne enlists him to help her discover who is kidnapping and killing teenage runaways for their organs and selling them on the black market. No Witnesses (1994) teams Boldt and Daphne again as they solve a case in which people across the country are being poisoned by food sold in supermarket chains. Beyond Recognition (1997) is a mystery involving an arsonist who targets single mothers but spares their children. The Pied Piper (1998) again focuses on children, this time in a case of kidnapping and black market adoptions. In The First Victim, Boldt is confronted with illegal aliens being smuggled into Seattle...