The short answer is, you don't need the book.
The longer answer is, yes, we do strongly recommend you have the Cocoknits Sweater Workshop or one of our On Demand classes to knit any of the Cocoknits Method patterns. The book teaches the Cocoknits Method for knitting top-down seamless sweaters, and the patterns refer to the book. If you would like to attempt to knit any of these patterns without the book or a class, you can. The patterns are complete on their own. However, they refer to techniques used in the Cocoknits Method, which are explained fully in the book and classes. Here is a link to our free Everlasting KAL and one to our free Everlasting KAL class, both of which link to free resources specifically for knitting the Cocoknits Method patterns.
Here is some more information about the Cocoknits Method, explaining how it is unique and why we have a book to teach it.
The patterns included in the book
