Russia Del Sol

Robert Kinross is pulled back into the sort of work he had hoped he was long done with, starting with a brutal ride to the interview and not getting much better once his car is bombed. He is forced to flee Russia via a harrowing border crossing, then make his way with the Russian billionaire's half-sister he is escorting to Spain for her wedding.
Dogged at every step by a half-brother who gets all if his sister ceases to exist, and a fiance seeking to ingratiate himself with the half-brother's Russian syndicate money, Kinross can only rely on the ultimate betrayl sooner or later.
Gritty from the start, it's not a very nice world Kinross passes through, but he will keep his charges safe at every turn, or die trying.