This month I’m getting my fill of a particular sort of academic study that brings together parallel examinations of several related subjects (or persons) to build a layered case for the author’s conclusions. There is often a tendency to throw in a section of random leftover topics somewhere toward the end. This sounds a bit more negative than I mean it to feel -- academic writing has some rules and structures that are quite different from a more popular approach to historic topics. But it can make it hard to recommend books like this to a general reader.