The Non-designers Design Book Design and Typographic Principles for the Visual Novice By Williams, Robin Book – 2014
Visual Design Ninety-Five Things You Need to Know – Told in Helvetica and Dingbats By Krause, Jim (Book – 2014 )
Sass and Compass in Action By Netherland, Wynn (Book – 2013)
stylesheet authoring using Sass and Compass.
Responsive Design Workflow By Hay, Stephen (Book – 2013)
Jump Start Responsive Web Design By Sharkie, Craig (Book – 2013)
Webmasters will want to read this excellent (short) book. It is about frameworks which will help you make your site work well on all mobile and desktop browsers, whatever screen size and resolution. 140 pages.
Learning Responsive Web Design, Clarissa Peterson, O’Reilly, – 2014