Gossip. Rumour. Revenge. Wun Wah Tower. Kwun Tong district, Hong Kong. When Siu-Man jumped from her window on the twenty-second floor, everyone assumed it was suicide. But Sui-Man''s sister, Nga-Yee, a quiet and unassuming librarian, is determined to prove it was murder. The police aren''t interested in re-opening a solved case so she contacts a man known only as N. – a hacker, and an expert in cybersecurity and manipulating human behaviour.What follows is a cat-and-mouse game through the vibrant city of Hong Kong. The pair''s investigation takes them from creepy commuter-train gropers to Siu-Man''s gossipy friends to the dark corners of the city''s digital underground – where online bullies, sexual predators and shady tech businesses stalk their prey...Reviews for Second Sister: ''An elaborate plot'' New York Times''Moves at a breathtaking pace and, with its bounty of high-tech hazard, excites like a vintage Tom Clancy novel'' Wall Street Journal''An important, multidimensional and even educational read into the dangers of cyber bullying'' The Straits Times''Sharp-witted and intense... Dangerous feuds, cybertheft, and a predator stalking Hong Kong'' Booklist