I know there are lot of people who want to learn that wonderful, but difficult language. It's not so easy to come across a good book. If you have enough money, or friend in Korea, you can invest into Hollym books (4 book set), they are difficult to learn by yourself, but worth every Won.
I give a link for downloading one book with mp3 files.
And as always, please do not redistribute the link I don't care about the file, you can reupload it everywhere, and claim it to be it even your book, but have mercy on my bandwith (MU):
Korean - A Complete Course for Beginners
And the torrent link for the same set:
Korean - A Complete Course for Beginners
Have fun!