‘Waves – The Electromagnetic Universe’ is another National Geographic sponsored book but I do not believe that it was well done. Juvenile rated, this book just touches on, from an introductory point-of-view, the differences between: radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma waves. Marginally suggested for children age ten to 14. Senior Doctor-at-Bass! D. A.