Wednesday Is Indigo Blue by Richard E. Cytowic

Discovering the Brain of Synesthesia

A lively exploration of synesthesia that combines scientific research, clinical case studies and vivid first-person accounts to show how cross-wired sensory experiences (such as seeing sounds or tasting colors) illuminate the brain’s organization for perception, memory and language. The book reviews neurophysiological and developmental evidence, discusses genetic and experiential factors, and shows how synesthesia informs creativity, metaphor and consciousness while challenging assumptions about sensory boundaries and what counts as a ‘normal’ mind.