"Professional ethics of a librarian" is a book that examines in detail the most important aspects of a librarian's professional activity from the point of view of ethical standards. The authors of the book systematize the ethical principles that should guide library practice, consider difficult situations that specialists in this field may face, and offer recommendations for solving them. This book is an essential reference for anyone who works in a library or who intends to enter this path, because it helps to understand how to maintain high standards of ethics and professionalism in working with books and readers.