Complicated Doesn't Make It Good

http://www.amazon.com/Book-About-Design-Complicated-Doesnt/dp/0805075755/ref=sr_1_1?s=books&ie=UTF8&qid=1445116670&sr=1-1&keywords=doesn%27t+make+it+good

This is one of the best books about design. It is written for children in the age range of 9-12, but I consider it as one of the most essential books when it comes to design.