Book critics are individuals who review and evaluate books, offering their opinions and insights on the writing, characters, plot, themes, and overall quality of a book. They may work for newspapers, magazines, websites, or other media outlets, and their reviews can influence readers' decisions on whether or not to read a particular book. Book critics often have a deep knowledge of literature and may specialize in specific genres or types of books. Their reviews can help to promote new authors and books, as well as provide valuable feedback to authors and publishers.