It depends on when the book was published, syns or as they are now known SWIPS have changed a lot, as do the nutritional value of foods, cost of living increases mean that food producers are using cheaper ingredients so the values change
Can I say, dont not go to a group
You may need to try a group or 2 before you find your "tribe "
The groups I attend have a fantastic consultant. She is so honest , she doesnt push SW products, she arranges group walks, nights out , and is there 24/7
There's a sign as you walk through the door - no strangers here - we are all friends - and we really are . A group of people all there for the one reason, lose weight and get a healthy attitude towards food.
Dont be scared to go. The consultant will welcome you, as will the girls doing the pay and weigh and someone will come over and say high and come your second week , everyone will greet you and ask after you
Join now before the prices increase. There's lots of free weeks to be found when there and seriously , the support in group is amazing - keeps me on target for 2 years now