If a book has dedication, acknowledgements, etc. sections in their books, do you treat those as a separate chapter or include those in the intros/outros?
In my experience, the credits are pretty straightforward and don't include unique or new material. When working on some platforms - such as ACX, a suggested script is provided for Opening and Closing Credits (see below). Occasionally, the author and/or narrator will add some additional promotional information (website, other books, production information, etc.). This is acceptable.
For sections such as Introduction, Dedication, Acknowledgements, etc., I treat this as individual chapters. In some (rare) cases, if the sections is short enough, I may group them into a single audio file. I would not include them in the Opening or Closing Credits.
Example Credits:

Related Articles
File Naming Conventions
People have different approaches, but most approaches have this in common: they facilitate organization, sorting, and coordinating your upload to ACX (or other platform). My approach is described below. It does not need to be your approach, but I do ...
Do I really need a proofer?
Most of you who have worked with me already know the answer to this. Yes. If there's one thing that you should absolutely outsource, it's proofing. And here's a true confession: I did not proof my first four books. I just recorded them and shipped ...
Understand ACX (and similar) Submission Requirements related to Loudness
Intro When it comes to delivering professional audiobooks, meeting specific loudness requirements is crucial. ACX, and platforms like it, measure audio loudness using decibels (dB). On a digital scale, 0 dB represents the absolute maximum level your ...
Any microphone recommendations?
Intro First, I must acknowledge that I am not a microphone expert in the traditional sense. While many can delve into the intricate details of microphone design and sound science, my expertise comes from nearly a decade of coaching voiceover artists, ...
How to address Rights Holder micromanagement
At some point, you are likely to encounter a Rights Holder that wants to control every aspect of your performance. This generally occurs when they are new to audiobook production and don't have a realistic perspective/understanding about how it ...