Restless Souls by Dan Sheehan

 

After three years embedded in the Siege in Sarajevo, war correspondent Tom returns to Dublin a haunted shell of his former self. Laughably unqualified, but determined to see him through the darkness, his childhood friends Karl and Baz embark on a journey for an unlikely cure, to an experimental Californian clinic called Restless Souls. But as they try to save Tom from his memories, they are forced to confront their own – of what happened to the lost member of their group, Gabriel.