It makes me smile almost constantly and occasionally laugh out loud. My wife has already read it, so it's one of those books where I keep going: 'I've just reached the part where Florence...' and we laugh about it because it's simply too good not to share.
Told from the point of view of Florence Armstrong, ladies maid to Lady Hardcastle it is full of nuanced wit, much of it around the rules governing the relationship between gentry and the rest of us. The relationship between Florence and Lady Armstrong is unconventional and based on several years of depending on each other in various, so far largely unspecified, hostile foreign environments.