This book is a delight. Cassandra's narrative voice is strong and distinctive but never annoying, which is an impressive thing to pull off. Beautifully written and observant.
This book contains some American characters who remark on things they find interesting/different about England. And yet as of 76% they haven't remarked on the thing I think I would have the hardest time with if I were transported back to 1930s England: pre-decimal currency.
A pound is 20 shillings and a guinea is 21 shillings and they just use both? I guess I would get better at mental arithmetic, or else just never know how much anything cost.