Visit refactoringui.com
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About Refactoring UI (refactoringui.com)
Tired of relying on Bootstrap? Learn how to design awesome UIs by yourself using specific tactics explained from a developer's point-of-view.
Thoughts...
I highly recommend visiting the website and buying this book. It is aimed at developers and it has a lot of great content to help you take the design stage of your project up level (or 10). A lot of clear advice is given and it's all very well illustrated.