Comment 5 for bug 1700300

I dont have a voyage but I cannot replicate this on my PaperWhite and OS
X combo. Indeed, I dont see how collections would make a difference to
calibre at all, since it does not know anything about collections on the
Kindle. It just scans the Kindle drive for all ebook files in known
formats and displays them. Are you sure the book is not showing up?
Maybe it is listed using some metadata different from what you expect.
Look at the number of books calibre is reporting to be on the kindle
before and after moving a book into a collection.

You can also run calibre in debug mode (Click the preferences menu and
choose restart in debug mode) and it will give you copious output
about its connection to the kindle.