This sounds pretty handy. I'll have to look it up and see how it works for me. And thanks again for your effort.

After a quick try:

Downloaded and moved my books to Audiobooks folder. The app didn't recognize a folder structure of Audiobooks/book/cd1/file1.mp3 , Audiobooks/book/cd2/file1.mp3 and so on.

Changed the structure to Audiobooks/cd1/file1.mp3 , Audiobooks/cd2/file1.mp3 and had to delete the previously created indexes and current status from /home/~user/.nqaap/ to stop it crashing on start.

Otherwise works great.