This book is cleverly written and split up into manageable sections on different aspects of Jane Austen's world, focussing on things like 18th century etiquette and how to conduct oneself at a ball! Its great to dip into (for fans) and really useful if you're studying Austen at A level, as it explains traditions and the social etiquette that was expected at the time - things that you really do overlook when reading the novels now.
It even goes as far as to discuss the relevance of women wearing "drawers" back in Austen's time! Without giving too much away, it would appear that a respectable young lady would never be caught in a situation where anything above the ankle need be exposed and therefore underwear was deemed unnecessary - promiscuous, even. See - you learn something new every day.