In this complete guide to wool - the most popular yarn around - passionate wool expert Clara Parkes translates the vast world of sheep and their wool into the language and context of knitting.

What is wool? Clara starts with the fundamentals: what wool is made of, how it gets off the sheep, and how it is transformed from a jumbled mass of dirty fluff into a gorgeous yarn that so tempts us at our local yarn stores.

Who makes it? Parkes conducts an inspiring tour of sheep breeds from around the world - introducing us to the animals who give us their wool - and explains how to best knit with yarns made from their fibers.

Which yarn do I use? If only there were a way to read a skein to know how it would behave and what it wanted to become. Now there is! Parkes demystifies the generic (non-breed-specific) wool yarn you'll find at your local yarn shop, showing you how to best determine what every yarn longs to be.

What do I knit? Parkes went to some of the most creative and inquisitive design minds of the kniting world to provide more than 20 patterns that highlight the qualities of specific types of wool.

The Knitter's Book of Wool teaches you everything you need to know about wool - and its journey from pasture to pullover. The next time you pick up a skein, you won't have to wonder what to create with it. You'll just know.