As you contine to read the book (Atkins I am assuming) you will find that he recommends you go to the OWL (Ongoing Weight Loss) phase after induction. Some people, with a good deal to loose can stay on induction levels longer, but others really should go forward to the OWL and then the pre-maintance level when you are a few pounds away from your goal weight.

Dr. Atkin's theory is that if you stay on induction too long, you may get bored with the food and then go back to carbs for variety. But there definately is an inbetween!