Title: Brain Quest Grade 1, revised 4th edition: 750 Questions and Answers to Challenge the Mind, Author: Chris Welles Feder
Title: Brain Quest Grade 3, revised 4th edition: 1,000 Questions and Answers to Challenge the Mind, Author: Chris Welles Feder
Title: Brain Quest Kindergarten, revised 4th edition: 300 Questions and Answers to Get a Smart Start, Author: Chris Welles Feder
Title: Brain Quest Grade 2, revised 4th edition: 1,000 Questions and Answers to Challenge the Mind, Author: Chris Welles Feder