You're either a Purple Cow or you're not. You're either remarkable or invisible. Make your choice.

What do Apple, Starbucks, Dyson and Pret a Manger have in common? How do they achieve spectacular growth, leaving behind former tried-and-true brands to gasp their last? The old checklist of P's used by marketers - Pricing, Promotion, Publicity - aren't working anymore. The golden age of advertising is over. It's time to add a new P - the Purple Cow.

Purple Cow describes something phenomenal, something counterintuitive and exciting and flat-out unbelievable. In his new bestseller, Seth Godin urges you to put a Purple Cow into everything you build, and everything you do, to create something truly noticeable. It's a manifesto for anyone who wants to help create products and services that are worth marketing in the first place.

If you enjoyed reading this, check out Seth Godin's business classic This is Marketing.

Seth Godin is the author of four worldwide bestsellers, including Permission Marketing, Unleashing the Ideavirus and Survival is Not Enough. He is a renowned public speaker and is contributing editor at Fast Company magazine. You can find him at www.sethgodin.com.