What synesthesia is and isn't
A brief two-hundred-year history
Alphabets, numerals and refrigerator magnet patterns
Five distinct clusters
Just how constrained is your umwelt?
Chemosensation: citrus feels prickly, coffee tastes oily green, and white paint smells blue
See with your ears
Orgasms, aura, emotions, and touch
Number forms and spatial sequences
Aquired synesthesia: more different than same
Mechanisms
Glossary
Notes
Further reading
Index.