Nathan Keighley studied chemistry at the University of York, with selected option modules in medicinal chemistry and organic synthesis. It was this course content that inspired the writing of this textbook, Introduction to Organic and Medicinal Chemistry because he hoped to pass on his interest in the subject to current students of organic and medicinal chemistry. Nathan then focused his studies into organic chemistry with a PhD in Environmental Chemistry, researching how organic molecules used in agriculture biodegrade in the environment to mitigate pollution, and later applied this skillset into a career in industry. Chemistry is a highly relevant subject to modern life and Nathan wishes the students who use this book the best of luck with their exams and hopes that they too are inspired to work in this most important of scientific fields.