The fourth rule of ten - Gay Hendricks

In the latest installment in the Dharma Detective series, private investigator Tenzing 'Ten' Norbu takes on the seedy world of human trafficking in Los Angeles and abroad. Following a shocking revelation involving his best friend and former partner, Bill, Ten is sent on an unexpected trip to Sarajevo to find a missing family member. This propels him on a mission to track down the ringleader of a corrupt worldwide organization operating through the dark tunnels of the Internet, whose impact hits too close to home.

Ten is aided by a diverse cast of characters, including his eccentric assistant, Kim; genius hacker Mike; informant-turned-entrepreneur G-Force; and Petar, a chain-smoking Bosnian cab driver and fellow ex-police officer.
Struggling to keep his personal and professional life intact proves difficult as Ten attempts to help Bill's strained marriage; resolve unfinished business with Bill's sister-in-law, Julie; heal his own family scars; and protect more innocent victims - all while facing down issues that are far bigger than he ever imagined.