This pattern will work well in an all wool or wool blend worsted weight yarn, too.
You only need a small amount of the CC yarn.
BE SURE TO SWATCH!
Many have found size 7 needles gets gauge.
CORRECTION from pattern in book:
The Shape Crown/Top of Hat section should continue with:
Round 7: * K3,k2tog; repeat from* around- 21 stitches
Round 8: * K2,k2tog; repeat from* around- 14 stitches
Round 9 * K1,k2tog; repeat from* around- 7 stitches
Round 10: K1, k2tog 3 times- 4 stitches
Then draw yarn through remaining stitches to close.