The book "Purple Cow, New Edition: Transform Your Business by Being Remarkable" by Seth Godin is about the concept of being remarkable in business and marketing. Godin argues that in today's crowded marketplace, being average or just good enough is not enough to stand out and succeed. He introduces the idea of the "purple cow," which represents something truly remarkable and unique that captures people's attention and makes them talk about it. The book provides insights and strategies on how businesses can differentiate themselves and create remarkable products, services, and marketing campaigns to attract customers and build a successful brand.