The document summarizes the tone of the book "Eleanor & Park" as very powerful because it depicts the extraordinary love between two opposite people. It notes that despite their differences, the characters do not care what others think and find happiness with each other. An example from the book shows the characters staring at each other's mouths on their way to school, deeply in love despite being so different. The document concludes that being different is no barrier to love, and one should not care what others think of their relationship.