Originally Posted by curiousgeorge
I was under the impression the mobi files were creating a TOC based on the .ncx. I dont typically create mobi but it is something I plan to dive into this summer.
When you use Calibre to convert ePub > Mobi, the NCX ToC is used to built the linked ToC in the Mobi.
When you use Kindlegen to convert ePub > Mobi, the NCX ToC is ignored. You would need a ToC that's a list of links and a guide entry for the ToC.