Please, update dart book to the last version.
We’re creating two Dart Apprentice books with a lot of new content to replace this one. The new books will be up to date for Dart 2.18.
Great, what’s the release date? I would like to buy them
I believe Dart Apprentice: Fundamentals is out now in the online version. The second book in the series (which has more of the newer content) comes out next week.