How to Draft Basic Patterns: second edition by Ernestine Kopp, Vittorina Rolfo & Beatrice Zelin
Grading Techniques for Modern Design by Jeanne Price & Bernard Zamkoff
I hear ya. You're thinking "What's so special about these? They're just your basic pre-1980 pattern design and pattern grading books." Well let me tell explain - 15 cents each in the discount book bin at the local Goodwill store.
Admit it, you're just a wee bit jealous aren't you?