I bought this book back in November. She doesn't say that all women should transition but she does emphasize the damage that relaxers can do to the hair.
She does go into a lot of detail regarding how to properly apply relaxers and how often to get them in order to minimize damage.
She says to stretch relaxers for as long as you can and tells you how to do this (keeping the newgrowth soft) and to apply relaxers to new growth only, not all of the hair during a retouch. She also goes into great detail about applying relaxers correctly to keep them from getting onto the scalp, the main problem that causes thinning edges (in her opinion).
The book was alright but it was over-priced. IN the back she has this question and answer section but a lot of the questions are the same.
I think that she is neglecting to realize that thinning edges are not caused by relaxerrs alone but by the hairstyle choices of many women. Tight ponytails, and braids and some wigs and weave styles can all pull out the sensitive hair around the edges, especially if the hair is relaxed(i.e. already damaged).