This is the fourth installment in Sophie Kinsella's Shopaholic series. In this novel, newly married Becky Bloomwood discovers that she has a half sister that she's never met. Not only is she outdoorsy and Becky's complete opposite, she *gasp* hates shopping.
Though they deign each other's existence at first, the two sisters eventually realize that they can count on family in a crisis and it's not the differences between them that really matter.
This book is just as delightful as the first three novels in the series, and it's great to meet a character so unlike Becky that it may even get her to realize her own flaws and what she needs to work on--just maybe. Don't get your hopes up too much. Fun read.