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- X-Train Your Brain: Level 1: Basic Warm Up: Putting Your Left and Right Brain to the Test to Enhance Alertness and Mental Agility
- The Brain Works: X-Train Your Brain Volume 2: Building Core Strength
- Supercharge Your Memory!: More than 100 Exercises to Energize Your Mind
- The Brain Works: X-Train Your Brain Volume 1: Basic Warm Up
- Francis M. Crinella
- David R. Kauss
- Lucy H. Hedrick
- M. Griss
- Wayne Rolfs
- Daniel L. Kohut
- P. Jonsson
- Lindsay Collier
- Joel Robertson
- W. Veenman
- Romney Oualline Nesbitt
- Monique Leponcin
- George D. Cohen
- Ellen Denise Junious
- Noland L. Vandemark
- Susan McBride Els
- Judith Rolfs
- Robin J. Constance
- Jacob H. Jordan
- Efua Baker