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.
"[A] neuroscientist and polymath."
- Wall Street Journal
"David Eagleman may be the best combination of scientist and fiction-writer alive."
- Stewart Brand
"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
"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
"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 is the kind of guy who really does make being a neuroscientist look like fun."
- New York Times