Here is AudioBook Mastering Suite version 4.
https://forum.audacityteam.org/t/audiobook-mastering-version-4/45908/1
It’s a long page, but it’s only three tools to go from raw reading to finished work. Two of the tools are custom and you have to download and install them.
Please use all the tools and in order. There are a suite, a harmonious grouping and depend on each other.
Post back if you have troubles. There’s a terrifically good chance we will want you to submit a short sound test if there’s a problem. Please use this format.
http://www.kozco.com/tech/audacity/TestClip/Record_A_Clip.html
Koz