Confession of a Shopaholic by Sophie Kinsella. Is a story of a British woman who works in finance to help others manage their financial situation, yet she is a crazy spender . Funny story and if you read this first series I guess you want to finish the second book right away.
This are the SHOPAHOLIC book series
Shopaholic Takes Manhattan , Shopaholic ties a knot ,Shopaholic and the sister ,Shopaholic and baby.