Intelligence levels

The bell curve: intelligence and class structure in American life

Richard J. Herrnstein, Charles Murray.

Brain Wave

Poul Anderson, Tom Weiner

The Development Of Intelligence In Children

Alfred Binet, Alfred Binet, Théodore Simon, Theodore Simon

Race and Intelligence: Separating Science From Myth

Jefferson M. Fish

Raise a Smarter Child by Kindergarten: Build a Better Brain and Increase IQ up to 30 Points

David Perlmutter, Carol Colman, David Perlmutter

Hothouse Kids: The Dilemma of the Gifted Child

Alissa Quart

A profile of the Negro American

by Thomas F. Pettigrew.

The Making of Intelligence

Ken Richardson

Can Asians think?: understanding the divide between East and West

Kishore Mahbubani.

Coloring outside the lines: raising a smarter kid by breaking all the rules

Roger Schank.