Robert Martin Robert Martin is an Excel MVP and Microsoft Certified Professional. With a background in finance, he has worked as an IT director for an investment bank in the UK, and worked on charitable projects in Africa before turning to authoring on MS Office dvelopment. Currently he works in Brazil as an IT Consultant. Robert Martin has also authored the following books: Excel Avancado, Digerati 2008. RibbonX: Customizing the Office 2007 Ribbon, Wiley 2008. Excel e VBA na Modelagem Financeira: Uma abordagem pratica. Axcel Books, 2005 Read More Read Less