2003 - The Light Barrier Understanding the Mystery of Irlen Syndrome and Lightbased Reading Difficulties (Paperback) ISBN-13: 9780312320287 ISBN-10: 0312320280 Genres: Health, Fitness & Dieting, Parenting & Relationships 1 2002 - The Light Barrier a Color Solution to Your Child's Lightbased Reading Difficulties (Hardcover) ISBN-13: 9780312304058 ISBN-10: 0312304056 Genres: Health, Fitness & Dieting, Parenting & Relationships, Religion & Spirituality 1 |