The hero of Cihan Acar's engrossing debut novel is a young Turkish-German man who has returned to "Hawaii", a troubled district in his native city of Heilbronn, searching for a new beginning in life after the premature end to his football career. As he does so, the simmering animosity between the city's self-appointed vigilante civil defence groups and Turkish mafia clans descends into full-scale war. By Volker KaminskiMore