You probably should beg, borrow or steal the latest version of the book - DANDR - Dr. Atkins New Diet Revolution. There are some significant changes reflecting a lot more experience with a lot more patients.

I haven't read the prior books, so I am going off what a lot of others have said. I wouldn't be surprised to find that your "Level One" is now called "Induction" with some tweaks - but my understanding is that the tweaks are important.

Happy reading.