Gladwell.com
This is Malcolm Gladwell's personal website, and provides more background information about the works that led up to Blink and also provides access to his previous works and articles as well.
'Blink': Hunch Power by David Brooks
http://www.nytimes.com/2005/01/16/books/review/blink-hunch-power.html?_r=0
A NY Times op-ed piece that gives a brief overview of the book and also provides David Brooks' assessment of the validity of Gladwell's argument. Brooks offers criticism that is helpful in understanding the scope of Gladwell's claims.
Be a blinking marvel by Stephen Bayley
https://www.theguardian.com/books/2005/feb/06/scienceandnature.society
Another overview of the main argument with a critique of its core components. It mainly addresses the issue of Blink as a succession of related anecdotes as opposed to a cogent argument.
Blinkered by Richard A. Posner
https://newrepublic.com/article/68000/blinkered
This is arguably the most extensive and most critical reviews of Blink, and provides an alternative argument to almost every one of Gladwell's main points in the book. Posner attempts to disprove and debunk the multiple anecdotes that Gladwell writes about and point out the contradictions, paradoxes, and ironies in them.
Project Implicit
https://implicit.harvard.edu/implicit/
Harvard University's Project Implicit contains several computerized Implicit Association Tests (IATs), discussed in Chapter 3 of Blink.
