Yeah, as I said first book on the original post, which is
Pimsleur compact Swiss german (audio language course CDs). No you don't need to sign up to download this.
1. You'll see the upper left corner "Request download link" if you click on the link i posted
2. Click on that "Request download link", wait until "download" appears
3. Click on "download" and that's it. It's 10 .mp3 files. I've just finished listening them, found it very basic though.