The 50% discount code for “Angular 2 Development with TypeScript” is mlfain

I don't get it. Ang2 is in alpha. I mean the next big thing to drop is Angular Connect https://github.com/angular/angular/milestones and one of the key parts of Ang2 is the ng-upgrade which nobody has started yet https://github.com/angular/angular/issues/3517

So I don't get how people are releasing books on Ang 2 without at least a beta in release out there.