Mixture of Jane Austen and Wizardry

This novel in letters playing the beginning of the 19th century. The two heroines, of which one in London and the other is staying in the country, to write long letters about their lives. First, they have only minor concerns such as non-matching clothes or boring neighbors. Gradually the events are always magical. Of course, the two must also get to know their husbands. Mostly, you realize that this book is the result of a letter writing game, which is why you do not know on the first page, how it will end.