A regency mystery with two unmarried sisters, fraternal twins, who try to help people in need by doing things which are entirely unsuitable for women in their era. Gus is a brazen problem solver whose height makes it easier to be a commanding presence. Julia is good at all the social graces and deep knowledge of peerage. They both have their limitations but they try to do things as a team. I enjoyed the setting and both of these characters and, once again, terrible cover and really good book.