Ruth Patrick 
Crochet Handbook and Stitch Guide [PDF ebook] 

Packed with step by step photographs and illustrations for every crochet technique, you will find detailed descriptions of stitch patterns such as bobbles, popcorns, clusters and shells, as well as ideas on how to use notions and embellishments like buttonholes, flowers, and edgings. Includes a special section to explain how to create beautiful lace, add beads, and work Tunisian crochet.