I did a fair bit of cord-cutting during a stint as a shamanic practitioner: in this book Denise Linn shared a tonne of stuff not taught in my training. She's thorough! As well as discussing what energy strands are, and how to clear the detrimental ones (take your pick of many methods), she also talks about strengthening beneficial ones, and why and when energy-protection techniques aren't always advisable... . Not a book so much as a compendium!