I think the English translation of this Japanese book is called The Pillow Book - or at least, so says this blog entry that really made me want to read this book.
Which I did, obviously.
It was interesting; I found it very poetic, snarky at times, definitely classist, and a wonderful plunge into 10th/11th century Japanese aristocracy (without having to personally suffer the consequences of time travel). Furthermore, I enjoyed the random lists that are peppered through the book. I don't know why exactly, but I did.
So this is a book in the UNESCO collection of representative works (Japanese series). Well, if the UNESCO approves, it must be good!
I kid, but really, it was an enjoyable read indeed. There are also 162 sections that divide this 281-pages long book, so if you overdose on this book, it's your own damn fault. Take it easy, take your time, and renew your library checkout so that you don't get slapped a fine.