Hi RJP! I buy all my books for cheap on www.half.com, so I looked for an audio version of anything by Dr. Atkins and came up with this... http://half.ebay.com/cat/buy/prod.c...=1856&meta_id=1

Also, Protein Power Life Plan, which is very similar to Atkins is also available on cassette: http://half.ebay.com/cat/buy/prod.c...=1856&meta_id=1

Hope that helps!