In Please Discuss, Katharine Whittemore looks four books on dyslexia: Maryanne Wolf’s “Proust and the Squid: The Story and Science of the Reading Brain’’; Thomas G. West’s “In the Mind’s Eye: Creative Visual Thinkers, Gifted Dyslexics, and the Rise of Visual Technologies’’; Shirley Kurnoff’s “The Human Side of Dyslexia: 142 Interviews with Real People Telling Real Stories’’; and Pulitzer-prize-winning poet Philip Schultz’s memoir “My Dyslexia.’’