Add sections to the bookbuilder: Letters to Friends on the Personal Christian Life (Leo Tolstoy)

 

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 Friends on the Personal Christian Life
Source, notes...