For the case you want a quick textual overview of folders and their related files and their names you have got already the tools as two command files (TreeView.cmd and FileList.cmd).
Surprisingly fast! 20.000 files read in and sorted and put out in 2 seconds on an old XP machine.
For the case you want a textual overview of tracks within albums resp. books and their artists resp authors and playtime and track count and so on you can use Mp3tag export functionality.
Keep in mind that the Mp3tag export section, as simple as it seems to come along, is a rather complicated tool, it bears quirks and traps.
So try it for yourself but not give up to soon, if the result is not so good as you have expected.
Back to your data ... you should not look further more to the folder names and filenames, but to the fundamental data in the tag fields.
It is recommend to have these data as clear and fine as it ever can be.
If so, creating of filenames or foldernames and even moving of entire folder trees will be not cruel but relaxed work.
Do make TRACK, ARTIST, ALBUM, DISCNUMBER and so on having all correct values, no leading and traling spaces, no multi spaces, numbers well and uniformed formatted.
For creating the report we take all data from the tag fields, because you do not want a folder and file list from the filesystem but an overview of Audiobooks, their titles and authors and playtime.
Take the attached mte export script and run it on the selected tracks of the audiobooks.
I give you this script as is, no more support available, adapt it to your needs as suitable.
Export_Text___Artist.Book.Disc.Track.mte (981 Bytes)
The mte script will create a report like the example in the attached file.
Export_Text___Artist.Book.Disc.Track.txt (14.9 KB)
DD.20110226.1355.CET
Export_Text___Artist.Book.Disc.Track.mte (981 Bytes)
Export_Text___Artist.Book.Disc.Track.txt (14.9 KB)