Designer Tim Brown is the Head of Typography for Adobe Type and Typekit. He's partnered with A Book Apart to release a new book called Flexible Typesetting (featuring a foreword by Jessica Hische), which is all about how to make websites and apps look better, along with how the web has changed typography:

For the first time in hundreds of years, because of the web, the role of the typographer has changed. We no longer decide; we suggest. We no longer simply choose typefaces, font sizes, line spacing, and margins; we prepare and instruct text to make those choices for itself. In this book, Tim Brown illuminates the complex, beautiful world of typesetting—arguably the most important part of typography because it forms the backbone of the reading experience—and shows us how to parry the inevitable pressures that arise when we can no longer predict how, and where, our text will be read.

Flexible Typesetting will add a whole bunch of tools to your design toolbox, as noted by the chapter titles:

• "What Is Typesetting?"
• "Preparing Text and Code"
• "Selecting Typefaces"
• "Shaping Text Blocks"
• "Crafting Compositions"
• "Relieving Pressure"

The book can be bought in one of three ways: paperback ($21 + shipping), ebook ($11), and both ($28.80 + shipping).