I did try to do an update on the first edition of Learning Node earlier this year, but the changes were just too significant. So many of the modules I covered are no longer supported, Express 4.0 happened, and then there's that Node.js/io.js thing, and skipping version 1, altogether. The first edition of Learning Node just can't be updated, in place. The only solution was a new edition. It's also a good time to do a new edition: there's more stability in the development of Node.js, and less personal ownership.