Small screens are everywhere now thanks to the mobile revolution. Learning how to design for small screens has become a necessary skill for many designers.
Mobile first is an important concept now, but it hasn't been long since it was an unknown. Luke popularised the idea, and this book summarises the reasons you should design things for small screens first.
Responsive Web Design
A short and practical look at the technical principles behind responsive design. When you need the same code to work for every screen size, this simple introduction is all you need.
Designing For Touch
This book dives into what you need to consider when your user's main method of interaction is a touch screen.