Ms. Carol DesJardins spent 25 years in the private sector as a programmer, systems analyst and eventually Chief Information Officer. During that time, she honed her skills with Excel as an analysis tool. She transitioned her knowledge to the classroom and has taught several applications and programming courses. Ms. DesJardins co-authored her first textbook on Excel. In addition to writing, she continues to teach at St. Clair County Community College. A leading textbook author, lecturer and instructor, Patrick Carey has authored or co-authored more than 40 popular academic and trade texts for the academic market. He has taught and written about a wide range of topics, including website design, JavaScript programming, Microsoft Office and Excel, statistics, data analysis and mathematics. Mr. Carey received his Master of Science in biostatistics from the University of Wisconsin, where he worked as a researcher designing and analyzing clinical studies. Today, he splits his time between Wisconsin and Colorado, and when he is not writing, he can be found hiking and cycling.