The map of the book
The chapters sit around the circle. Each dot is an organisation, instrument, report or place, drawn between the chapters that name it, and sized by how often. Something named in one chapter sits by that chapter; something the whole book returns to sits near the middle.
OrganisationInstrumentReportPlacePerson
129 of the 525 entities are drawn by default, those named at least three times or in more than one chapter, and 499 with every entity a chapter names. Position shows which chapters name a thing and nothing else; the distance between two dots is not a measure of any relation between them. The full list is in the wiki.