From the book:
“Crochet lace is one of my favorite techniques, but it can sometimes be difficult to work in socks because of crochet’s lack of stretch. To make up for it, these socks feature a simple lace pattern with the extra stretch of the extended single crochet (exsc). A strong heel adds a bit more room in the heel, and a short leg makes the sock perfect for women with all calf sizes.

“These toe-up socks are worked with a modified square toe and strong heel.”

Finished size
Foot length: 8” (9”, 10”) (20.5 {23, 25.5} cm).
Foot circumference: 7” (8”, 9”) (18 {20.5, 23} cm).
Leg length: 7” (17.5 cm).

Notions
Split-ring stitch markers (sm), tapestry needle.