Since the street occupations began in September in three key spots - Mong Kok, Admiralty and Causeway Bay - the authorities have largely tolerated protesters.
China's central government has continuously condemned the ongoing street occupations, and state-controlled mainland media outlets have accused pro-democracy activists of "intensifying" the crisis with the latest clash.
After months of protests and street occupations, the crisis in Ukraine has intensified over the last week into something that may now be approaching a revolution.
The book concludes with very short, slightly hasty texts on the English riots and the Wall Street occupation last year.
Yau's full immersion into the world of politics came during the 79-day umbrella movement street occupation, in 2014, in which tens of thousands of Hong Kong residents took to the streets to demand greater democratic rights.
"I couldn't stand by and just watch everyone fight," the 39-year-old pop star recalls of the clashes in September 2014 that sparked the former colony's umbrella movement street occupation, two years ago next week.
Beijing appeared to have successfully stared down a challenge from pro-democracy activists in 2014 when it refused to cede any political ground in spite of a 79-day street occupation hailed the umbrella movement.
Nevertheless, some figures are credibly cited as influential, notably David Graeber, an American anthropology don at Goldsmiths in London, who helped organise what became the Wall Street occupation in its early weeks; his books include Direct Action: An Ethnography, Debt: The First Five Thousand Years and Fragments of an Anarchist Anthropology.
Claiming he had suffered bruises during his arrest, he later returned to continue rallying the crowds in their street occupation.
As Harry Cheadle pointed out in his article on the Wall Street Occupation, it's a technique that's as clever as it is irritating.
