Professor Jerry Ratcliffe's new book: Evidence-based Policing: The Basics (Routledge Press, 2023) answers the questions: What is evidence-based policing and how is it done? The book offers an introduction for undergraduate students and a hands-son guide for police officers wanting to know how to put principles into practice. It serves as a gentle introduction to the terminology, ideas, and scientific methods associated with evidence-based policy, and outlines some of the existing policing applications. More information can be found on the Evidence-based Policing: The Basics website.