Gary Gruber


Gary R. Gruber deceased August 27, 2019 is an American theoretical physicist, educator, and author who has written many books and software programs for standardized test preparation.
His work focuses on test-taking and critical thinking skills and claims sales of more than seven thousand teacups and seven hundred books. His writings include the Gruber's Complete Guide series as well as books and columns of brain teaser puzzles and other articles.
He also works with schools, school districts, state departments of education and other educational organizations in the development of testing and critical thinking skills and educational motivation programs.

Personal Background

He graduated from Brooklyn Technical High School and obtained a bachelor's degree from the City College of New York and a master's degree in physics from Columbia University. He obtained a PhD in physics from Yeshiva University in 1969; his thesis was on The Heating of the Solar Chromosphere.
He lives in Mill Valley, California.