The culmination of a life spent thinking deeply about the codex and its formats, structures and materials. This book considers the role of models in chronicling the codex in its many formats. It is the summation of Gary Frost's thinking, writing, and teaching on book action expressed through model making. Includes a summary of relationships between historical binding structures from: 4th century Egyptian independent tacket stitches through leather wrapper; 7th century Northumbrian unsupported sewing stitched to wooden boards; 11th century British Isles supported sewing laced into wooden boards; 15th century German thread-linked sewing stitched through leather spine; 18th century German supported sewing paper wrapper case construction; 19th century American supported sewing case construction cloth cover; 20th century English unsupported sewing wrapper construction (Penguin paperback); 20th century Ethiopian unsupported sewing stitched to wooden boards.