"Butter" by Asako Yuzuki is a gripping crime novel that takes readers into the dark world of a gourmet chef and serial killer. Set in Tokyo, the story follows Manako Kajii, who is imprisoned after being convicted of murdering lonely businessmen. These men were captivated by her exquisite culinary skills, which enthralls the nation. Journalist Rika Machida, often overlooked in her job, begins an exchange with Kajii by requesting a recipe for beef stew. What starts as journalistic research evolves into a profound exploration of human nature and the darker sides of passion. As Rika delves into the culinary arts, she begins to question herself and her own beliefs. Inspired by a true event, "Butter" offers a haunting and disturbing read that blurs the lines between good and evil.