This book provides a guide for undergraduate criminology and criminal justice students undertaking their final-year dissertation. It speaks to the specific challenges for criminology students who may wish to research closed institutions (such as prisons, courts, or the police) or vulnerable populations (such as people with convictions, victims of crime, or young people), and offers guidance on how to undertake research on these topics whilet avoiding many of the access and ethical obstacles. It takes students through each phase of the dissertation, from designing and planning the research to writing up and presenting the completed work. The complexities of undertaking research on sensitive topics and with criminal justice institutions are discussed throughout, offering an insight into some of the challenges that students may be faced with and suggestions to overcome obstacles. It offers practical guidance for empirical and library-based projects and provides students with suggested resources for accessing primary and secondary data. It utilises a mixture of worked examples, top tips, practical strategies, and student activities to ensure the dissertation is a manageable and enjoyable process. This book will be beneficial to all undergraduate criminology students who have to undertake either a library-based or empirical dissertation. The examples and activities in the book will also be useful for dissertation supervisors who can use them to support their dissertation students.