I actually have this book!
It looks like the sweater is started at the sleeve edge and when you get to the bottom of the second column on page 91 you'll see where you cast on 25 or more stitches on each side of the sleeve for the front and back of the body.
After you work each half of the sweater you seam it up the back and then pick up stitches around the bottom for the ribbing.
A very different technique for sure!
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry