This was an unusual book. Although it fits into the f/sf category-its an end of the world by plague story, it is set in the 21st and 22nd century, but without any substantial advances-the most sophisticated transport is by balloon and they still use steam and sail. And there are no medical scientists trying to avert the plague. The characters are all of noble birth and therefore all heroes, even where they are abandoned as children but subsequently discovered to be from aristocrat families. England has become a republic, but is appointing a Lord protector, who seems to be an Oliver Cromwell model. Much of the dialogue is expressions of love of each other and of nature, with abundant classical references. Its not really gothic like her Frankenstein. I struggled to finish this, but towards the end it improves and becomes quite tragic-children and friends die in the most Victorian tear jerking fashion. I liked the dog.