Because it’s an older title, you can often find the physical, full-color hardcopy on sites like eBay or AbeBooks for less than the price of a lunch. Having the physical version is actually a massive advantage for a book this visual. Master WPF the Right Way
While it’s tempting to search for "WPF 4.5 Unleashed" via cracked PDFs or GitHub repositories to save a few bucks, going the unofficial route usually causes more headaches than it solves. This book is widely considered the "Bible" of Windows Presentation Foundation, and if you're serious about mastering XAML, there are better ways to get your hands on it.
It teaches you how to build custom controls that look professional.
You can often "borrow" digital copies of programming books legally for free.