Many people first read Harper Lee's book in school, as most schools have it as recommended reading. The lessons in the book may not "click" so much at that age - mostly kids would identify with Scout and enjoy the plot threads concerning Boo. Poor Tom Ronbinson's struggles on the other hand is the stuff of nightmares for many adults. I believe that every grown-up should read this book a few times in their life, if only to get a glimpse of what it's like to live in someone else's skin.