This book was a major disappointment.
Written by an American it advocates behaviour which would have curled the hair of my etiquette teacher at school, such as "If a lady discovers she can attend a party for which she has already declined an invitation, she calls her host and asks if she may attend" A lady would realise that when she declined her hostess would have to make alternate arrangements to fill the place. By telephoning to ask if she may come she is placing her hostess in a very awkward position.
Statements such as "a lady knows when to use a straw" are totally usless to those who do not know as weare not enlighted as to Ms Simpson-Giles opionion on when one should reach for said straw.
There is no book yet written to better Debrett's and I,as an etiquette teacher, would rate How to be a Lady as a waste of money.
British manners are in high demand in North America, don't go teaching American ideas of manners in Britian, please.