m4b-tool merge "data/my-audio-book/" --output-file="data/merged.m4b" Since the most used subcommand of m4b-tool seems to be merge, lets talk about best practice ...

If you've published a book in your field to demonstrate your expertise and attract more business opportunities, you may also want to create an audiobook version for sale on Apple's iTunes store.

Is the statement that the current implementation uses AAC for the M4B correct? From looking at the code it looks like all the FFmpeg operations utilize the copy option for the audio stream, therefore ...