Add sections to the bookbuilder: Letters to Berkman and Emmy Eckstein (Milly Witkop-Rocker)

 

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.

 
Section
Select
Title, author, date...
Letters to Berkman and Emmy Eckstein
Source, notes...