On page 6, instructions for Wrap & Turn (W & T) have been added:
Work until the stitch to be wrapped. If knitting: bring yarn to the front of the work, slip next st as if to purl, return the yarn to the back; turn work and slip wrapped st onto RH needle. Continue across row. If purling: bring yarn to the back of the work, slip next st as if to purl, return the yarn to the front; turn work and slip wrapped st onto RH needle. Continue across row.
Picking up wraps: Work to the wrapped st. If knitting, insert the RH needle under the wrap(s), then through the wrapped st K-wise. Knit the wrap(s) together with the wrapped st. If Purling, slip the wrapped st P-wise onto the RH needle, and use the LH needle to lift the wrap(s) and place them on the RH needle. Slip wrap(s) and unworked st back to LH needle; purl all together through the back loop.
On page 7, in the Gusset Heel instructions under the gusset decrease, pattern should read "Work in your chosen pattern across instep..."
On page 10, in the Toes instructions, all special stitches are on page 6, not page 7.
This clarification has been added to the Mitered Heel instructions on page 8 and 12: "For a st that's wrapped twice, pick up both wraps and K or P them with the st."
On page 11, in the Gusset Heel option of the Toe-Up Socks pattern, the Increase round instructions have been changed to add "Work across instep sts in pattern. On heel side: K1, M1L, K to last st, M1R, K1." In the Begin Short Rows instructions, in the last sentence, work two fewer sts past marker until there are 8 sts between increases, not 10. There will be a total of 63 sts across the heel at that point.