comments:
I started with Nancy Ziemanns book Fitting Finesse. I think it's been reprinted under a slightly different title. It's not the most in depth book, but I liked it to start with because it told me very step by step how to adjust for a big belly and for a big bust and for narrow shoulders, my three main adjustment. https://www.amazon.com/Fitting-Finesse-Nancy-Luedtke-Zieman/dp/0848714377 And the old PBS episode where she describes her method and shows how to do it. https://youtu.be/2QXlOsXFUok?si=2EYGJOji7rSkTgGZ It was first published in the 90s when the US was thinner so I'm not sure how well her methods work if you're extremely obese, but from personal experience it worked for me at about size 20 in the Big Four patterns and I'd expect it to work for smaller sizes as well.