[HarryT]

Here's an example.

The file "book.prc" was created from "book.opf" using Mobi Creator. As you'll see when you open it, it has both a cover image, and a "Table of Contents" link which takes you to the TOC. The file "test.mobi" was created from the same OPF file using the command line:

opf2mobi --mobifile test.mobi book.opf

You will find that it has no cover image, and, although it has a "Table of Contents" link, that link takes one to the first page of the book, rather than to the TOC.

I believe that the Guide items in the OPF file are specified as you describe, so any light that you could shed on this would be most welcome.

Thanks!