p>Blood Brothers #2, in the Dead Man’s Rule series, by Rick Acker
Brothers Karl and Gunnar Bjornsen built a pharmaceutical empire and develop a neural stimulant drug that increases strength and intelligence. When sibling rivalry takes control, Gunnar flees with the secret formula and hires lawyer Ben Corbin to defend him. Ben and his wife Noelle end up in Norway when the case turns up embezzlement and black market deals and the Russian mob. Who ends up paying the ultimate price?