To those of you who finished the book already: Did you read the あとがき and the other stuff, and was it worthwhile?
After finishing the main story I did not feel like proceeding to it immediately as I was quite caught in the feels of the letter, and then I somehow postponed it…
I read them and thought they were pretty interesting. Particularly the longer one by the editor, since he talks a lot about 吉本ばなな’s becoming an author.
They don’t talk a lot about the book itself, so you’re not missing a lot by skipping them if you’re not interested in the author’s personal history.
My version doesn’t have the other stuff - only the short あとがき, which I think is worth reading. One line surprised me though it probably shouldn’t have.
Oh and extra comment to say I’ve finally finished! Read all of the chapter 12 and the あとがき today.