Blood From Blood - Tapa blanda

John Rain has gone to ground. He's had enough of doing people's dirty work for them. He's had his fill of killing. Yet when his old nemesis tracks him down, he is forced to do his bidding. Powerful, secretive elements threaten to bring down the government - and Rain must stop them the only way he knows how. Getting involved will expose his few friends and contacts to extreme danger. But no one knows this business like John Rain, and no one would underestimate a man protecting all he holds dear...

Ex CIA agent Barry Eisler has lived and worked extensively in Japan, and now lives in New York. He earned his black belt in Judo from the Kodokan International Judo centre in Tokyo. His first novel was Rain Fall.