John Paul Mueller is a freelance author and technical editor. He has writing in his blood, having produced eighty-seven books and over 300 articles to date. The topics range from networking to artificial intelligence and from database management to heads-down programming. Some of his current books include a Windows command line reference, books on VBA and Visio 2007, a C# design and development manual, and an IronPython programmer's guide. His technical editing skills have helped over sixty-three authors refine the content of their manuscripts. John has provided technical editing services to both Data Based Advisor and Coast Compute magazines. He's also contributed articles to magazines like DevSource, InformIT, SQL Server Professional, Visual C++ Developer, Hard Core Visual Basic, asp.netPRO, Software Test and Performance, and Visual Basic Developer.