Whispering shadows - Jan-Philipp Sendker

Paul Leibovitz was once an ambitious advisor, dedicated father, and loving husband. But after living for nearly thirty years in Hong Kong, personal tragedy strikes and Paul's marriage unravels in the fallout.
When he makes a fleeting connection with Elizabeth, a distressed American woman on the verge of collapse, his life is thrown into turmoil. Less than twenty-four hours later, Elizabeth's son is found dead in Shenzhen, and Paul, invigorated by a newfound purpose, sets out to investigate the murder on his own.
As Paul, Elizabeth, and a detective friend descend deeper into the Shenzhen underworld they discover dark secrets hidden beneath China's booming new wealth. In a country where rich businessmen with expensive degrees can corrupt the judicial system, the potential for evil abounds.