The Decker/Lazarus Series is a collection of mystery novels written by author Faye Kellerman. The series follows the lives of two main characters, Peter Decker, a police detective, and his wife, Rina Lazarus, who is a former Orthodox Jewish community member. The books blend elements of crime investigation with themes of faith, family, and morality. The series began with the novel The Ritual Bath in 1986 and has since expanded to include multiple titles. Each book typically features a new case for Decker to solve, often involving complex social issues and ethical dilemmas, while also exploring the dynamics of his relationship with Lazarus.