La vache pourpre : rendez votre marque, vos produits, votre entreprise remarquables !

Purple Cow: Transform Your Business by Being Remarkable is a 2003 book by Seth Godin. The book presents Godin's personal belief that creative advertising is less effective today because of clutter and advertising avoidance. The book advocates that companies produce remarkable products and target people who are likely to spread word of mouth about the product. USA Today said it "reminds business people of the tried-and-true path to success: Make a great product".