Home › Authors › Beaver, Ph.D., John B 👤 Beaver, Ph.D., John B 3 books Books by Beaver, Ph.D., John B Astronomy, Grades 5 - 8 Astronomy, Grades 5 - 8 2009 Electricity and Magnetism, Gra Electricity and Magnetism, Grades 5 - 8+ 2009 Solar System, Grades 5 - 8+ Solar System, Grades 5 - 8+ 2009