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Synesthesia is a cognitive trait which affect more than 3.7% of the world’s population – that’s at least one out of every 27 people! Yet it is generally unknown to most people. This book explores more than 80 different types of synesthesia, from the more common, such as colored letters and numbers and colored days of the week, to the extraordinarily rare, such as flavors in one’s mouth producing perceptions of musical chords.

150 pages.  Includes pictures, charts, and diagrams.

FREE – in PDF format

e-mail Sean A. Day


to request a copy.