Andre Castagna, Ph.D.

Dr. Andre Castagna is the author of both Let's Review: Geometry and Barron's Regents Exams and Answers: Geometry. He has taught mathematics at Albany High School in New York State. Castagna has a Ph.D. in engineering, and spent the first ten years of his career working in the design and development of nuclear power systems for the United States Navy. During that time, he was the author of numerous published technical articles and reports.

About the Publisher

Many great things begin with a tiny spark, and for Manuel H. Barron that spark came from a mimeograph machine in the basement of his Brooklyn, NY, bookstore in the late 1930s. People from the community asked Mr. Barron for books to help their children study for the New York State Regents exams. After realizing there wasn't anything available, Mr. Barron created his own study guides.

Now, more than 80 years later, Barron's continues to help millions of learners worldwide prepare for their next steps. With offerings from pre-college prep to world language guides and professional certification exams, Barron's wants to be part of your success story no matter what learning path you're on. You can trust Barron's to provide exceptional products created only by top experts with years of experience in education. From generation to generation, our mission remains the same: Learn, grow, and succeed with Barron's throughout your life-long learning journey.