[Tarana]

I liberate all my audiobooks and sort them by folder Genre--> Author. I have nearly 1000 audiobooks and found Calibre was an easy way to not only catalog them but to have a description of what the story is about. Create a separate library and use the Empty book function to create one. I added a separate column to indicate where I bought it from (CD, Audible, etc.). I originally used a spreadsheet, but having that meta with the description was so much better, IMHO. I listened to an audiobook while assembling the Calibre Audiobook Library.

If I didn't liberate my audiobooks, I wouldn't buy any. I had audiobooks disappear from my Itunes account, B&N stopped selling or maintaining audiobooks, several publishers remove books from your library a few years after they stop selling them or the company goes bust without warning. I have never had a problem with Audible (a book disappeared, but they brought it back as soon as I asked). However, there is no guarantee that rules won't change or the company remains solvent in 5 years.

edited to add: FWIW, I archive using just Mp3 today. My later Ipods and nanos handle it well. Also, duplicates can be an issue. Fortunately, I have only accidentally bought one book twice; others were deliberate because of change of narrators or to replace the audiobooks Itunes took out (they returned to my account 5 or 6 years later).