Book excerpt: Frontiers in Drug Design and Discovery is a book series devoted to publishing the latest and the most important advances in drug design and discovery. Eminent scientists have contributed chapters focused on all areas of rational drug design and drug discovery including medicinal chemistry, in-silico drug design, combinatorial chemistry, high-throughput screening, drug targets, and structure-activity relationships. This book series should prove to be of interest to all pharmaceutical scientists who are involved in research in drug design and discovery and who wish to keep abreast of rapid and important developments in the field. Volume 12 of this series brings together reviews covering homology modeling and anti-infective drug discovery. Topics included in this volume are: - Homology Modelling: A Computational Tool in Drug Design and Discovery - Anti-trypanosomatid Drugs/Candidates in Clinical Trials: What's New and What's Missing? - Nitroheterocyclics As Anti-Tuberculosis Agents: An Overview - SARS-CoV-2 Protease Inhibitors of Natural Origin: Current Scenario and Future Prospects as Anti-COVID-19 Agents.