Does anyone know of a good book on designing your own sweaters or other knitting projects? I have always wanted to knit up designs of my own, but have been too scared to try. I found a good article on Knitty.com on using percentages to design a sweater, which sounds interesting. Has anyone tried this? I don't know why I have a fear of knitting something up that I designed myself, maybe I'm afraid of failing. I guess I can always rip rows out if they don't work. Thoughts?