Robert Ludlum's The Bourne retribution

Bourne's friend Eli Yadin, head of Mossad, learns that Ouyang Jidan, a senior member of China's Politburo, and a major Mexican drug lord may have been trafficking in something far more deadly than drugs. Yadin convinces Bourne to investigate. Bourne agrees, but only because he has a personal agenda: Ouyang Jidan is the man who ordered Rebeka - one of the only people Bourne has ever truly cared about - murdered. Bourne is determined to avenge her death, but in the process he becomes enmeshed in a monstrous world-wide scheme involving the Chinese, Mexicans, and Russians.