My associate Brian Rasmussen released this book through Microsoft Press a few months ago: http://www.amazon.com/High-Performance-Windows-Store-Brian-Rasmussen/dp/0735682631/ref=sr_1_1?s=books&ie=UTF8&qid=1414429701&sr=1-1.
Here's the short review I wrote on Amazon:
Performance is something that's easy to talk about but difficult to do. You could say that every app could in some way perform better, but how do you really think about where to make investments? Too often, developers take an ad hoc approach, not really clear on what they're trying to accomplish. This can waste a lot of resources in areas that won't have real impact on the customer experience. In this book Brian brings years of real-world insight to the question of finding what matters, clearly defining your performance goals, and then going through the process to measure the app's present reality, making changes, and evaluating progress. And like another reviewer has said, performance information–even just what tools are available–is scattered around, and having one place to bring it all together is super-valuable.
At 240 pages it's a concise treatment of the subject and for the price (Amazon has it at $14.13), it only takes one or two good improvements to your app to more than pay for itself!