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.
"David Eagleman offers startling lessons.... His method is to ask us to cast off our lazy commonplace assumptions.
- The Guardian
"What Eagleman seems to be calling for is a new Enlightenment."
- Sunday Herald
"A popularizer of impressive gusto...[Eagleman] aims, grandly, to do for the study of the mind what Copernicus did for the study of the stars."
- New York Observer
"[A] neuroscientist and polymath."
- Wall Street Journal
"Eagleman has a talent for testing the untestable, for taking seemingly sophomoric notions and using them to nail down the slippery stuff of consciousness."
- The New Yorker
"David Eagleman may be the best combination of scientist and fiction-writer alive."
- Stewart Brand
"David Eagleman is the kind of guy who really does make being a neuroscientist look like fun."
- New York Times