Peter Stanford uses twenty different churches (plus a few cameos) to explore twenty centuries of the history of Christianity in the British Isles – which sounds an ambitious task, and it really is. It's a history of the religion, rather than strictly of the place or people, which does affect the slant of how events and trends are perceived (a decline in church attendance might be less important in other history books, for example). It's also probably inevitable that is really a history of Christianity in England (and occasionally Scotland, and, briefly, Wales and Ireland).
Telling a history through church buildings, however, remains a fascinating project. Stanford has a wealth of examples to chose from, as well as a wealth of knowledge and research to display (although I could ask for a little more suggested reading). He gives a robust defence of the practice of church-walking and the value of using a church for telling histories – even in what is no longer a 'churchy nation', where the flow of history in ancient places won't reach back to the ancestors of everyone now living in these islands.
The discussion of architecture is very light, and the stones don't so much talk as direct the reader to interesting events, before quickly being left behind. Certainly, with twenty centuries to cover, Stanford doesn't hang around, and the pace is snappy and engaging. You'll not find many accounts of such a long period that cover so much ground and detail.
My biggest gripe is probably the structural decision to have each chapter dedicated to one church and one century. The second chapter, for example, covers the second century AD/CE (using a shrine not actually recorded until the 1070s). The problem is that historical trends don't obey those arbitrary divisions, and Stanford is forever nipping back and forth into the previous or next century in order to make his point. The Industrial Revolution didn't stop in 1800. I'd personally have preferred a church to illustrate a theme rather than a specific century. On the plus side, this structure almost forces him to give equal attention to all of the centuries, rather than spend ages on, say, the Reformation, while skimping on other periods. If only there were more evidence to fill those first few centuries...
On the whole, a very readable and broad account of Christian history in England, with plenty of tips for places worth a visit.