In this genre-bending thriller, Antonio Tabucchi, Italy’s premier writer, draws together a gypsy, a young tabloid journalist with a passion for Lukács and Vittorini, and an overweight lawyer with a professed resemblance to actor Charles Laughton, to solve a murder that leads far up and down Portugal’s social ladder. As the investigation delves deeper into this shadowy world, the novel moves beyond the traditional twists of a suspense story to consider the moral weight of power and its abuse.…