I downloaded this great 64 kbps average Larry Niven Novel Collection.  I took out the audiobooks that are part of a series and converted them into .m4b files, all but the Known Space books are in one file per series.  The Known Space books are in chronological order by publication date I put them into 2 files. They all sound great for their size.  I will be uploading the rest of the collection in 3 days