Joe,
If you put the default topic in every book, autosynchronize
will also cause every book to open when the help file is open not
just one. I ran into this when I had a contact info page (which was
repeated in the TOC, as a default topic. It wasn't what I wanted at
the time.
I'm not sure what you are trying to do but for several small
projects I've wanted to have the TOC completely expanded and yet
organize the topics into books. I've done this by using empty books
as place holders in the TOC so it looks like an expanded TOC. Of
course, this only makes sense with a small project with a dozen or
so topics in a few books.
John