Physics Essence: Mechanics and Waves (Kawaijuku Series) 4th Edition Purchased in 2020 for 924 yen. Physics Essence: Heat, Electromagnetism, and Atoms (Kawaijuku Series) 4th Edition Purchased in 2020 for 924 yen. * There are pencil markings such as "○, △, ×" next to each chapter number. * Some parts of the text also have pencil underlining.