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I had bought The Astronomy Book, The Ecology Book & The Science Book for my 12 year old son and haven't seen him without one of it in his hands since then! It does speak volumes about all three books. Separately I had also bought Heads Up Money by DK for my 16 year old daughter. It is also a gem.
This book is for adults and interested teenagers who want to get to grasp with the essentials of our universe. It’s done historically by posing the questions a scientist asked and then showing how he or she progressed toward understanding. It’s a great approach that works for me.