A while ago the "microhistory" trend took off - books like Salt, Cod, Coffee and Aspirin flew off bookstore shelves into our collections. I'm seeing a variant on the trend, as yet unnamed, which I'll dub the "annual history": books like 1492 (and the "prequel" 1491), 1968, 1789 and other memorable years.
Perhaps history writ large is too much for our ADD-based lives? Or is there another reason? Anyone?