Silent Parade

Nan Hai Chu Ban Gong Si
Silent Parade
Keigo Higashino is a Japanese author chiefly known for his mystery novels. He served as the 13th President of Mystery Writers of Japan from 2009 to 2013. He won the 31st Edogawa Rampo Prize in 1985 for his novel After School. In this book, he tells a story of a series of murder cases with unexpected outcomes. What defines the punishable motive for a crime?