"A Course in Enumeration" is a specialized book that deals with combinatorial enumeration, a topic that is both accessible and challenging. The author, Martin Aigner, guides readers in a relaxed manner from the fundamental concepts to a variety of subjects ranging from algebra to statistical physics. The book is aimed at both students who wish to be introduced to this fascinating field and professional mathematicians looking to deepen their knowledge. It is divided into three main parts: Foundations, Methods, and Topics. With a total of 666 exercises, the book offers numerous opportunities to reinforce what has been learned. A special feature is that each chapter concludes with a highlight discussing a particularly beautiful or famous result.