If you are developing a business apps for Windows 8.1 or WinRT 8.1.1, this is a must read book from O’Reilly. The authors Matt Baxter-Reynolds and Iris Classon are providing us with a well-written, accessible and practical book. Most of all, you are guided through the details of designing and building a complete, useful, fully functional business app.
The code crafted throughout the 15+ chapters is well designed. It allows the readers to quickly grasp the concepts explained, like transitioning from .NET, XAML, MVVM, persistent data, the app bar, notifications, settings, sharing, searching, background agents, resources and localization.
If you are short on learning time want to create a working application at the same time you are building your skills, I highly recommend you read this book and start developing professional Windows 8 apps today.