"Rules Relating to the Deceased: Philosophy and Aḥkām" by Islamic Humanitarian Service provides a comprehensive overview of the Islamic laws and philosophical perspectives regarding the deceased. The book covers various aspects, including the rituals of burial, mourning practices, and the ethical considerations surrounding death. It emphasizes the significance of adhering to these rules for the spiritual well-being of the deceased and the living, while also offering insights into the beliefs about the afterlife in Islam.