It is a puzzle, thriller, and bizarre award-winning mystery novel published by the famous Japanese mystery novelist Masashi Yokomizo in 1978. It has been reprinted many times and has been warmly welcomed by the general public in Japan, especially young people. In the book, the author creates an ugly image of the frightening gorilla baron Fuyanagi Fuyuhiko, and describes Fuyanagi as a well-known physiologist with high attainments in Japan. Greedy and treacherous, addicted to gems, pursuing a life of luxury and lust, he even murdered his elder brother Guliu Xiayan with madness, abducted his son Longyan, and usurped his property and the title of baron. He also stole and robbed gems from others. He didn't hesitate to kill and rob, and committed all kinds of evils. As a result, the famous Japanese physicist and private detective, Dr. Oyamada, solved the whole case with his keen mind and amazing perseverance.

However, this heinous villain was not willing to die like this. Before he died, he left a last word to his close assistant, Dr. Bei Dao: After his death, his body will be transported to an isolated island in the Seto Inland Sea. On Jazz Island, he used a major invention he completed during his lifetime - the human brain transplant operation, to transplant his brain into the head of a gorilla. In this way, a baron gorilla with a human mind was resurrected. to the world.In order to retaliate against Dr. Koyamada and the wider society, the revived gorilla baron has done one heinous crime after another - kidnapped Dr. Koyamada's daughter Miyoko, and robbed the billionaire The priceless "Sun and Moon Gem Crown" even produced appalling infectious bacteria - Yersinia pestis and venom, in an attempt to poison the people.

In order to eliminate the revived Baron Gorilla, Dr. Oyamada and others, with the cooperation of police officers from the Metropolitan Police Department, launched thrilling battles of wits and wits with him one after another, and finally subdued him and wiped out the harm for the people. In the novel, the author uses the technique of suspense to write each chapter in a tense and thrilling way, which deeply attracts readers. This book is a novel that runs through knowledge, science and fun, and is very useful for inspiring young people. Reasoning and judgmental thinking ability will play a certain role.This book is translated based on the seventh edition issued by Kadokawa Shoten in Tokyo on August 30, 1982.