I now think that I could have enjoyed the last two books of the Neapolitan novels more if I gave them more time. Sometimes gobbling up a book leaves it a little chance to be thoroughly thought through, it leaves a little chance for the characters to be understood and related to. And I got annoyed with every one of the characters in the "story of the lost child".
But I still could not put the book down. And I'm glad it leaves readers with a somewhat open ending as I've always been good in inventing ones of my own.