Using Audacity for Audio Books is a BAD IDEA!
There is a tremendous difference between Podcasting and narrating audio books. With Podcasting you can pretty well do as you please unless you follow the AES recommend standards which are a -20 to -16LUFS with a -1dbTP and a max of 4dbs for the LRA. (Loudness Range). If you plan on recording audio to submit to the ACX, their requirements…