Are you looking for a copy of the book? Or the pattern for that specific quilt? The book is available used from Amazon. Debra Wagner may never have published her lover's knot pattern. Here is a link to the book on Amazon:
http://www.amazon.com/Yourself-Machi.../dp/0801981891
p.s. I'm a big Debra Wagner fan, but I don't think she's published anything in years. Her family owned a Bernina dealership; not sure if she is still quilting or not. She won a lot of awards for her machine quilting even though she is color-blind (always had a friend choose the colors for her).