Is the era of the reference book coming to an end? Publishers evidently don't think so. Not only have we seen an explosion in the number of handbooks, companions and dictionaries produced by the mainstream academic press in recent years, but even older, well-established ‘brands’ continue to flourish. Here is the fourth edition of Oxford University Press's ‘flagship’ Oxford dictionary of the Christian Church (ODCC), considerably expanded and revised from the third edition. Yet although libraries continue to buy works such as this, and academic colleagues to use them and refer to them, students often – if my experience is anything to go by – prefer the easier, cheaper, faster route of online sourcing, and particularly Wikipedia. A review of this edition of the ODCC has to reckon, then, not only with evaluating the content of the work itself, but, more sharply than perhaps was necessary before, with the questions of who exactly is likely to use it, and how it stands up in comparison with the competition.