Charles Petzold’s latest book – Creating Mobile Apps with Xamarin.Forms – has been sent to (electronic) press and is now available for download!

This first edition has 27 chapters, and covers Xamarin.Forms 2.x including Animation, MVVM, triggers, behaviors, custom layouts, custom renderers, and much more. 

https://developer.xamarin.com/guides/xamarin-forms/creating-mobile-apps-xamarin-forms/