Eric Freeman is described by Head First series co-creator Kathy Sierra as "one of those rare individuals fluent in the language, practice, and culture of multiple domains from hipster hacker, to corporate VP, engineer, think tank." Professionally, Eric recently ended nearly a decade as a media company executive, having held the position of CTO of Disney Online & Disney.com at The Walt Disney Company. Eric is now devoting his time to WickedlySmart.com and lives with his wife and young daughter on Bainbridge Island. He holds a Ph.D. in Computer Science from Yale University. Elisabeth Robson is co-founder of Wickedly Smart, an education company devoted to helping customers gain mastery in web technologies. She's co-author of three bestselling books, Head First Design Patterns, Head First HTML with CSS & XHTML and Head First HTML5 Programming.