This Preview Edition ebook is about writing applications for Xamarin.Forms, the new mobile development platform for iOS, Android, and Windows Phone unveiled by Xamarin in May 2014.
Xamarin.Forms lets you write shared user-interface code in C# and XAML that maps to native controls on these three platforms.
Download the PDF (5.14 MB) 
Download the Mobi for Kindle file (40.85 MB)
Kurt Shintaku's Blog 