The PDF version was his first book. As with anyone I've followed in the lowcarb world, they "tweak" things as they learn & grow. (Dr Eades & Dr Atkins both did, to name two). There are updates in the new book.
Losing weight is hard. Maintenance is hard. Being fat is hard. Pick your hard. (-Ishbel)
Lost 95 lbs on IP!
Link to weight loss Photos