"Methods of Ethics" by Henry Sidgwick is a classic work that examines the main approaches to moral issues. In the book, the author systematically analyzes and compares three main moral theories - consequentialism, deontology and virtualism. Sidgwick examines questions of responsibility, justice and duty, conducts a logical analysis of arguments and tries to determine generally accepted principles of ethics. With its insightful and analytical approach, Methods of Ethics remains an important source for understanding contemporary ethical debates.