After nine-year hiatus, Prof. Purnomo Yusgiantoro, Ph.D finally once more published his new masterpiece as an Indonesia’s energy economy expert. This time, he brought a young energy economy expert whom also his first son, Dr. Luky Yusgiantoro to collaborate together in creating a new book, titled “Ekonomi Energi: Teori Dan Aplikasi”. This book consists of ten chapters, with each chapter b…