Complete 7 Volume Set - How And Why Wonder Books - The Science Library, All books Early 1968 Printing. Volume & Subject: (I) - Book 1 - Beginning Scince / Book 2 - Science Experiments / Book 3 - Light And Color (II) - Book 1 - Magnets and Magnetism / Book 2 - Microscope / Book 3 - Machines (III) - Book 1 - Sound / Book 2 - Mathematics / Book 3 - Electricity (IV) - Book 1 - Our Earth / Book 2 - Rocks And Minerals / Book 3 - Weather (V) - Book 1 - Oceanography / Book 2 - Chemistry / Book 3 - Human Body (VI) - Book 1 - The Moon / Book 2 - Planets And Interplanetary Travel / Book 3 - Stars (VII) - Book 1 - Flight / Book 2 - Rockets And Missiles / Book 3 - Atomic Energy Good clean condition. Please ask all questions prior to bidding... Returns are welcome 14 days - Buyer covers return