Errata: The book says Yarn A is Beaded Silk & Sequins Light. It should read
Artyarns Beaded Silk Light (100% silk with glass beads): 1.8 oz/50 g = 160 yd/146m): (A), 1 skein, color black with black beads #246M—approx 160yd/146m of lightweight yarn

Link to Knitalong Group:
http://www.ravelry.com/groups/reverse-chevron-cowl