TOC for hierarchical book using child book TOCs?

Question

(My first hiearchical book in FM11. Win7x64.)
I've created a book of two child books.
Each child book has:
A generated TOC as its first file. Its first paragraph in the primary flow has the paratag dtc-ChapTitle.
Content as its second file, with tags such as h1-Head1, h2-Head2, and other paratags.
(Side note: that child book design implements the idea of a chapter TOC without using a text inset. That's how this adventure started.)
dtc-ChapTitle appears only in the (generated) TOCs of the child books (1's above), not in the content files (2's above).
The parent book has two child books and a generated TOC. The generated TOC of the parent book is to include dtc-ChapTitle, h1-Head1, and other paratags.
The parent TOC does generate with h1-Head1, and other paratags, but not dtc-ChapTitle.
Maybe I don't know how to think about hierarchical books and am clinging to flat-book thinking.
Am I being gently nudged toward using the <$chaptertitlename> variable somehow?  Section "cover pages" ?  But how do I make a "chapter TOC" the first file in the child book -- or otherwise make the chapter TOC appear before the chapter that it describes?
Best regards,

Answer 1

Latest news:
I switched from using a child book to using the Folder feature.
As the "template" file for the folder, I re-used the chapter TOC file that was part of the old child book.
So the book looks like this:
FrontCover
ParentBookTOC
FolderChapterFile
ParentBookIX
Results are:
ParentBookTOC now contains the chapter name that was missing from the book-of-books design attempt higher on this thread. The name is flowing in from Folder. Good.
In Folder, <$chaptertitlename> correctly produces the text that I typed in in the folder's Container Properties > Title. Good.
Folder is, in fact, the chapterTOC file from the previous architecture. So when I open ChapterFile and generate a separate TOC file, it appears as content of Folder. Good.
The chapter running header variable in ChapterFile produces a blank result. Not good.
When I attempt to use <$chaptertitlename> in the running header variable in ChapterFile, it produces the file name, even after I regen the book. Not good.
Adobe's blog entry leaves a logical gap in its coverage. The important sentence is: " For all other documents which are neither Folder template file nor part of the FM book, variable will reflect the filename of the file in which it is used." (emphasis added)
The file in this case is not a Folder template and is part of the book. In this case, the variable is producing the name of the file, not the Title from the Folder's Container Properties, even after I regen the book.
Again, I don't have a book-of-books now. I have a single book with a Folder.
So how do I type the chapter name in one place, say as the Folder name, and have that available in ChapterFile?