The book is a collection of articles written by Michael Chugani (褚簡寧), who was a pro-government journalist. All the articles, except the Epilogue, was written before the new Hong Kong National Security Law (that has jurisdiction over the world.)
The preface said, "What happened in the past 12 months can best be described as the start of rule by fear in Hong Kong. One country, two systems is becoming a facade. As a Hong Kong-born, it is painful for me to watch our core values become core values with Chinese characteristics..."
He wrote a sad story in beautiful English.
Don't read the book before you sleep. You will get nightmares.