It’s here: a new edition of Responsive Web Design is now available from A Book Apart! Our editor-in-chief, Sara Wachter-Boettcher, sat down with Ethan Marcotte—who first introduced the world to RWD right here in A List Apart back in 2010—to talk about what’s new in the second edition, what he’s been working on lately, and where our industry is going next. The first edition of Responsive Web Design came out in the summer of 2011. What projects have you been working on for the past three years? (alistapart.com)