In September, 2009, Sum became the number 2 book in the United Kingdom on Amazon's bestseller list, only behind Dan Brown's Lost Symbol.
Wednesday is Indigo Blue: Discovering the Brain of Synesthesia has been awarded the Montaigne Medal, Eric Hoffer Award for Books.

Hear the actress Emily Blunt (Young Victoria, Devil Wears Prada) read "The Cast" from Sum. She is one of the dozens of terrific actors who read for the audio book.
Want to know how neuroscience will force major changes in our criminal justice system? Read David's article The Brain on Trial in The Atlantic. Now anthologized in 2012 Best American Science and Nature Writing.
