Crush It! by Gary Vaynerchuk

"Crush It!" is a book written by Gary Vaynerchuk, a Belarusian-American entrepreneur, internet personality, and author. The book was published in 2009 and is a guide to building a successful personal brand and business using social media platforms such as Facebook, Twitter, and YouTube. It emphasizes the importance of authenticity and passion in building a loyal following and monetizing that following through various means such as affiliate marketing and product creation. The book is considered a classic in the field of social media marketing and personal branding.