This was an excellent book - if there was one downside, it's that it is so revered and adored that my expectations were extremely high. It didn't quite meet them.
Nonetheless, for a book that takes place entirely inside of a hospital room, what Tey did here is quite remarkable. And it's all that much more remarkable because the heart of the book is basically grocery lists and dressmaker accounts from the 15th century. Her debunking of history - not merely the primary question relating to the fate of Richard III's two nephews in the Tower, but the whole of our uncritical acceptance of myth as fact (what she calls Tonypandy)- was awesome.
What a tragedy that there is so little Tey.
I think that my favorite Tey is still my first Tey, Brat Farrar. But, like Christie, I'll be able to answer that question more definitively after I've read them all, at least twice.