If you are looking for the book WPF 4.5 Unleashed by Adam Nathan, there are several legitimate ways to access the content and its supporting materials on and official publisher sites: GitHub Resources

If you're looking for features or functionalities within WPF itself, here are a few highlights:

UI Elements: Detailed coverage of controls, layout, resources, data binding, and styling.

Finding the Book Legally

1. Publisher's Website: Check the publisher's website (often Addison-Wesley or Pearson) for the book. They might offer a free chapter or a sample version.
2. Online Libraries and Stores: Look for the book on online stores like Amazon, Google Books, or Apple Books. Some might offer a preview.
3. Microsoft Learn: Microsoft's official learning platform offers a lot of free material on WPF, which could be a great alternative or supplement to the book.

1. WPF 3.5 (2007): This version introduced the WPF platform and included features like 2D and 3D graphics, animation, and multimedia support.
2. WPF 4 (2010): WPF 4 added features like improved performance, new controls, and enhanced data binding.
3. WPF 4.5 (2012): WPF 4.5 introduced significant improvements, including better performance, new features like data validation, and support for Windows 8.

• WPF Samples: Official WPF samples from Microsoft
• WPF Contrib: A community-driven WPF project with various contributions
• ModernUI: A WPF implementation of the Modern UI design language