This companion offers a user-friendly and practical introduction to the various aspects of studying and researching Criminology and Criminal Justice. With study skills coverage integrated alongside broad overviews of the key theories and concepts that drive Criminology and Criminal Justice, the book offers an authoritative overview for those starting out in their studies. It is also packed with helpful reflective questions to encourage the reader to think more deeply about the material and its application in the real world. This is an essential resource for students with no prior experience of studying Criminology or Criminal Justice, as well as for those who want a handy reference book at any point in their study and further career. It has been designed to be used as pre-course reading, as a core text on introductory Criminology, Criminal Justice or Criminological Skills modules, or as complimentary reading on Criminological Theory modules.