Before writing a reflection, you must evaluate your interpretation of the book. Put aside your overall analysis and break down its high points. Take out a piece of paper and write down themes, characters and moments in the book that stuck out to you. This allows you to recognize parts of the book that meant the most and allows you to link corresponding ideas together while forming the thesis of your reflection. Create an outline after linking ideas to give a sketch of your reflection and show where additional support may be needed.
Begin your reflection by summarizing the events, but don't lay out the plot and explain what happened in the book. Instead, support events that occurred by explaining how it made an impression, altered your perception toward an idea or connected to your life. This should not be simply in reference to the book but should exemplify your chosen thesis and how you plan to explain your interpretation.
The purpose of a reflection is to exemplify what you have learned. Do this by selecting facts and points of the book that are relevant to your interpretation and use them to convince the reader that your interpretation is legit. Take a moment to review the focal points of the book, main themes and quotes or situations that stood out. Do any tie into your life or past experiences? If so, broaden the topic by making it personal.