Theatrical plays are based on dialogue and are always very interesting. I do not know how fluent you are, but take a look at Ibsen. Maybe try this one http://www.amazon.co.uk/Enemy-People-Wild-Duck-Rosmersholm/dp/0199539138/ref=sr_1_2?s=books&ie=UTF8&qid=1438906341&sr=1-2&keywords=an+enemy+of+the+people