If I am not mistaken, we would need more details to answer your question. What author do you need to talk about? Do you need to pick any work of his or her? Being aware of the writer's purpose when you read helps you evaluate how well the writer has achieved the purpose and decide whether you want to follow where the writer is trying to lead you. The active reader reads more than the words and more than even the ideas: the active reader
reads what the writer is doing. The active reader reconstructs the overall design, both the writer's purpose and the techniques used to realize that purpose.