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Wow, this book became much more than I expected and not like most of the books I read. Flint's eye disease was a very central problem, but it seemed to be a metaphor to his life. He had trouble physically seeing things, but he discovered his opinions of others may have been distorted too. He was forced to reflect on how he treated people and tried to understand things through their eyes. In addition, his comic became a therapy to deal with his own life. He added Diamond to its plot and had her support the main character, just as McKell was doing for Flint in real life. However, it turned out McKell had some serious emotional issues of her own. They combined with Flint's medical and comic book problems to create a compelling novel. "Danny's Challenge" became the catalyst for change, as his messages were always positive and urged viewers to action. The book presented an emotional rollercoaster, as there was drama, suspense, laughter, and tears. It will cause readers to think about how they treat others and consider the power of being positive. Overall, this was an outstanding book, and I highly recommend you give it a shot.