What Angular2 tutorial (book/screencast) should I purchase now?

I prefer structured learning. I'm considering ng-book-2 (book + screencast). I'm ready to dive into TypeScript with ng-book-2. What is your thought?

My goals for learning Angular2 are mainly for (1) personal development: I'm a fan of Angular, and (2) I want to get started with Ionic 2 in the near future. I'm new to Ionic.

Is now the time to invest in Angular2 learning materials?