Dear everyone, I just started a PhD in Literary Theory & a, wondering about how to frame my topic. My PhD is about contemporary Conceptual writing & I want to focus on three or four individual writers but wonder if that would be broad enough? Maybe I should discuss ALL of Conceptual writing? Or would it be sufficient to take this small group of writers as examples of trends in Conceptual writing? Would appreciate tips, I just started and am stressing out a bit.   

that is not my field but what about starting from broad to specific. eg
....of Conceptual writing: a case study of ....

Thanks, that is exactly what I had in mind, I just was not sure if a case study would be sufficient, considering that it is a PhD.