Others here probably have the book, if you give us the name of the book and the name of the pattern it could help. I'm stumped. My only thoughts are to work the strands of yarn as 2 sts and k 1, sl 1, which I seriously doubt, or that maybe it's a misprint?
Cheating is an option. . . . Cheaters never win and winners never cheat, but smart knitters who want to retain an iota of sanity do, cheerfully. ~~Kory Stamper