Steven Holzner is the award-winning author of 108 books on computing, specializing in online topics like XML. His books have sold over two million copies, and have been translated into 23 languages. He's been a contributing editor to PC Magazine, and has been on the faculty of both Cornell University and MIT.
He's been using XML since it first appeared, and routinely communicates with members of various W3C XML working committees (responsible for setting XML standards). Steve has written many books on XML, including Inside XML (several weeks in the Amazon top 100 bestsellers), Real World XML, Ajax for Dummies, Secrets of RSS, and dozens of others that involve the use of XML. He also teaches a course around the country on XML to Fortune 500 company programmers.