Jon J. Raasch is a freelance web developer specializing in web apps for desktop and mobile devices. A user-experience junkie, he builds HTML5 and JavaScript apps that focus on the users at every touch point.

Jon is the author of several John Wiley & Sons books, including JavaScript Programming: Pushing the Limits, Smashing WebKit, and Smashing Mobile Web Development. A perfectionist when it comes to best practices, you can find him building the modern web in his pajamas.

Follow Jon on Twitter @jonraasch and check out his website http://jonraasch.com. He's currently based in Portland, OR.

Graham Murray is a software architect specializing in building UI development tools. At present, he works at Infragistics, where he builds data visualization UI controls for desktop, web, and mobile. He is passionate about many programming languages, and he builds source-to-source compilers between them. As a kid, he found some BASIC code in the back of a magazine and hasn't stopped programming since.

Vadim Ogievetsky is a developer at Metamarkets, where he uses D3 on top of AngularJS to build interactive data-driven applications that scale. Prior to working at Metamarkets, Vadim was part of the Stanford Data Visualization group, where he contributed to Protovis and D3. Vadim is an avid promoter of D3 and web-based data visualization; he has guest lectured on D3 at UC Berkeley, Harvard, and Stanford as well as at other universities, meetups, and corporations.

Joseph Lowery currently builds websites, creates online courses for Lynda.com and other sites, writes fiction, and hangs in Brooklyn. His books about the Web and web-building tools are international bestsellers, having sold more than 400,000 copies worldwide in nine different languages.