The book "Metal and Base Catalyzed Synthesis of Annulated Carbo- and Heterocycles" authored by S Thavaselvan, is a comprehensive guide to the synthesis of various types of annulated carbo- and heterocycles using metal and base catalysis. The book covers a wide range of topics, including the fundamental concepts of metal and base catalysis, the different types of annulated carbo- and heterocycles, their properties and applications, and the various synthetic methods employed for their preparation. The book also discusses the recent advances in the field of metal and base catalysis, which have revolutionized the field of organic synthesis. The author, S Thavaselvan, is a renowned expert in the field of organic synthesis, with many years of research experience in metal and base catalysis. He has published several research papers and review articles in high-impact journals, and his contributions to the field have been widely recognized. Overall, "Metal and Base Catalyzed Synthesis of Annulated Carbo- and Heterocycles" is an essential resource for researchers, graduate students, and professionals in the field of organic synthesis, who are interested in the synthesis of annulated carbo- and heterocycles using metal and base catalysis.