“Life Book” is a home-friendly AED (Automated External Defibrillator) designed in the form of a book. More than 50% of cardiac arrests occur at home, yet most households do not have an AED due to its bulky, unattractive, and unfamiliar design. “Life Book” addresses this issue by seamlessly integrating into home environments. It can be stored alongside books on a shelf, ensuring easy access in emergencies while blending naturally into daily life.