Sweetlily, I am a cheapskate (and a librarian) so I rarely buy books. Lucky for me, public libraries always have multiple copies of Atkins, and usually they are the ancient ones, so you can get the pre-2002 editions very easily if you have access to a library. If you can't find it/haven't been to the library in ages, just ask someone. They love to help!

Having said that, I might buy a used copy eventually. They make me give the books back to the library eventually, and I have a feeling I will need to reference my copy of Atkins on an ongoing basis. I'll hit up the used book store in town and if it's not there, I'll buy it used on Amazon.