This book was given to me by my Alexandert teacher when I asked her for a recommendation.

I like it. It is well-structured: a) basic terms, b) a in my opinion honest and enthusiastic exposition of the possibilities this technique has to offer (spoiler: it's not only about posture), c) exemplary, in my opinion sometimes pessimistic, exposition of the possibilites this technique has to offer when teached in schools, and d) a tentative list of suggestions for self-experimentation without teacher.

I am not sure if I would have understood the d) part as I do now after some Alexander lessons. I think lessons are some sort of shortcut to the experiences Alexander has to offer.