There is a pattern Errata for Shawl Sweater on page 23...
It should read as follows:
With 2 strands of Col B (heavier weight yarn) using US 11 needles CO 270 (274, 278)sts.
Row 1 (WS): Purl.
Row 2: Knit.
Repeat these two rows once more.
Row 5: Purl.
Row 6 (RS): With Col C (lighter weight yarn)*Slip one stitch pick up acorresponding CO stitch from behind of work- knit them together- Repeat from * till the end of row.
Space Between the Folds (WS):
With one strand of Col A work in St St (starting with Purl row) for 6 rows.
Repeat Fold & Space in Between Folds Patterns once more.
On the third repeat of the pattern use 2 strands of Col C for Space Between the Folds.
For the 4th & 5th repeats use one strand of Col C for Space Between the Folds.
Next: Work Fold pattern once more, but BO all the sts once they are folded on Row 6.