Technique book for playing without nails?
Just as the title says, I am starting to realize that a lot of nail techniques don't really apply to the same extent when you play without them, (hand angle, different way of plucking the string, etc.). I am looking for a book that would at least highlight the differences for specific exercises, or have a few of them that focus on playing with flesh. It doesn't have to be 100% focused on this.