The lesson that DR. Jekyll learns is that he shouldn't have taken the drug because it changes his life forever. For example, when DR. Jekyll turns into Hyde, his personality changes into evil. He can be hazardous because in the book it says that he killed someone and ran away. This shows that trying to change yourself has very negative affects. For one, he can't spend time with the people he likes, for fear of turning into Hyde, and he can't do his projects because he might turn into Hyde. Also,now people are going to keep an eye on Hyde and if someone sees him turn back into Jekyll, then it will be really risky. DR. Jekyll will be in a worse situation because of it and now, he can never be himself without Hyde. If Jekyll didn't take the drug, he would be better off without Hyde around. I rate this book a “7 out of 10” and the illustrations a “5 out of 10.” I really recommend this book because it is full of mystery and action and after every page there is a picture, which makes it very easy to visualize. One unanswered question I would like to ask is… What made MR. Hyde so evil? Was it something in the drug? If so, would Jekyll still have some control over Hyde because Jekyll has the same brain when he turns into Hyde?