Killigrew and the Golden Dragon by Jonathan Lunn
As Killigrew races to recapture Zhai Jing-mu before the pirate can wreak vengeance on those responsible for his imprisonment, he finds treachery and murder waiting around every corner. And somewhere in this tangled web of intrigue lurks the fabulously wealthy Blase Bannatyne, tai-pan of the leading company importing opium into China.