I have a masters degree in taxation. My company logically put me to work doing data analysis and project development. I use SAS, VB, ACCESS, EXCEL, whatever gets the job done. I do not speak, nor do I want to speak, COBOL. SAS is my only avenue to Main Frame data. What is available from SAS and from third parties is disgusting. This book is like the many comprehensive Windows books. I had never used SAS variable arrays before and this book taught me all I need to know. Probably not for the super SAS geek, but for those many of us needing to do our own data access and analysis using SAS, definitely the most complete single volume on the market. Well worth the money.