Larry Moseley is something of a detective...an Excel detective. In a 35-year corporate financial career that has spanned the range from startups to megacorps, Larry has often had to analyze and make decisions based on Excel spreadsheets created by colleagues. And he has been constantly amazed at how frequently he finds errors in such Excel projects, errors of omission and of commission, sometimes glaring but frequently quite subtle. The danger, as Larry rightly points out, is that critical corporate decisions are made based on the results of spreadsheets. A company will often determine...