Cristian Darie is a software engineer with experience in a wide range of modern technologies, and the author of numerous books, including his popular AJAX and PHP tutorial by Packt, his ASP.NET E-Commerce tutorial, by APress and his forthcoming SEO tutorial for PHP developers by Wrox Press. Cristian is studying distributed application architectures for his PhD, and is getting involved with various commercial and research projects. When not planning to buy Google, he enjoys his bit of social life. If you want to say 'hi', you can reach Cristian through his personal website at http://www.cristiandarie.ro.