The Pixel Perfect Precision Handbook is an absolute must-read for designers, with lots of tips to help with graphic design, digital design, and interactive development. Even the most seasoned hands will probably learn a few new best practices for crafting digital designs. Design techniques to ease the transition from pixels to code. There are now more of the fundamental Pixel Perfect Principles, including Users, Motion, and Prototyping.

It’s available as a PDF or for iBooks here:

http://www.ustwo.co.uk/blog/the-ustwo-pixel-perfect-precision-handbook-2/