Don't get me wrong: I deeply appreciate freeware! But this software only worked for me with about one out of every three audiobook titles I tried to convert. I use Leopard (10.5.4) and the most recent versions of the full QuickTime and iTunes. Two things happened: Either Join Together displayed Applescript errors and could not complete the job, or the joining process hung after QuickTime opened the third mp3 file. Having an enormous audiobook collection, it was imperative that I find some way to join the thousands and thousands of mp3s that were crowding up my iTunes and iPod lists. I'm sure it's the same problem for many other Mac users, so I encourage the developer to fix the problems with this Applescript. When I finally discovered AudioBook Builder, I was really happy to discover that it works perfectly. It also chapterizes the converted audio files, without the use of the Apple Chapter Tool that I was never able to find on the internet. (Hint to developer: Why not provide a link on your website to help people find it?) Well anyway, I was happy to pay $10 for AudioBook Builder, because it helped me enormously to organize my audiobook collection and with minimal effort. In it's current state, Join Together yielded few successes for me.