Morris Hein is professor emeritus of chemistry at Mt. San Antonio College, where he regularly taught the preparatory chemistry course and organic chemistry. He is the original author of Foundations of College Chemistry and his name has become synonymous with clarity, meticulous accuracy, and a step-by-step approach that students can follow. Over the years, more than three million students have learned chemistry using a text by Morris Hein. In addition to Foundations of College Chemistry, Eleventh Edition, he is co-author of Introduction to General, Organic, and Biochemistry, Seventh Edition, and Introduction to Organic and Biochemistry. He is also co-author of Foundations of Chemistry in the Laboratory, Eleventh Edition, and Introduction to General, Organic and Biochemistry in the Laboratory, Seventh Edition.Susan Arena has taught chemistry to students at many levels including middle school, high school, community college and most recently at University of Illinois, Urbana-Champaign. She especially focuses on using active learning techniques to improve the understanding of concepts in chemistry. Susan currently authors chemistry texts and electronic media, and presents workshops for teachers in suing active learning and electronic media to teach chemistry. She collaborated with Morris Hein on the seventh edition of Foundations of College Chemistry and became a co-author on the eight edition. She is also a co-author of Introduction to General, Organic and Biochemistry, Seventh Edition.