Add sections to the bookbuilder: Freedom - Opening Preface to the First Volume (Freedom Press (London))

 

With complex structures, e.g., a chapter with subsections, selecting only the chapter is likely to select only the chapter's title, so probably you want to select the chapter and all its subsections.

The text structure is shown below.

 
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Title, author, date...
Freedom - Opening Preface to the First Volume
Source, notes...