David Sklar is a Distinguished Engineer at Ning, part of Glam Media. Inaddition to PHP Cookbook, he is the author of Learning PHP 5 (O'Reilly), and Essential PHP Tools (Apress), and a scintillating blog: http://www.sklar.com/blog/ . David lives in New York City and has adegree in Computer Science from Yale University.
Adam Trachtenberg is the Director of Platform and Services for eBay and is the author of two O'Reilly books, Upgrading to PHP 5 and PHP Cookbook. Adam has an MBA from Columbia Business School. While there, he focused on general management and operations, with an emphasis on the field of technology. Adam also has a BA from Columbia University. As an undergraduate he majored in mathematics, and his other studies included computer science and Chinese.