Context:

Tom and Dominic refer to this throughout the series as the definitive survey of the case, with Sugden writing that the quest for Jack the Ripper's identity has proved 'at best inconclusive, at worst downright fraudulent.'

Context:

Described by the hosts as "the definitive book" on the Ripper case and "by far the most scholarly and sort of serious book on this." They note that Philip Sugden is the brother of John Sugden, the definitive biographer of Nelson.