[svenlind]

I have (re)started with audiobooks. I discovered that listening to an audiobook in bed and not doing anything else can give a new dimension to the book, especially if it is a good narrator.
My Danish supplier af audiobooks deliver the books as a large number of MP3 files. They have an app that somehow is good enough, but there is no TOC. A TOC is important when you want to both listen to the book and read the book normally on my ereader.
I have contacted the supplier but not yet received an answer.
Is there a not too complicated way to add a TOC to a bunch of MP3 files? Is that the purpose of m4b files?