Sean Castrina

Sean Castrina is the author of 8 UNBREAKABLE RULES for Business Start-Up Success, the most endorsed start-up book ever written as it is hailed by N.Y. Times Bestselling authors, the academic community as well as countless entrepreneurs. His companion workbook is the first of its kind to take aspiring entrepreneurs step-by-step through the start-up journey. He is also author of the How To Be An Entrepreneur Series and THE GREATEST ENTREPRENEUR IN THE WORLD: THE TALE OF 7 PILLARS, as well as being a much sought after speaker and business coach. Sean is a serial entrepreneur having started his first company at age 23 and has not stopped as he has started more than 15 successful companies ranging from retail, property management and development, direct mail, consulting to home services. His first passion is business as he continues to start businesses each year and it is with this relevance that he can teach with authority on Entrepreneurship.

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"Thanks again for your excellent work, George! When this one is a NY Times Bestseller, it will be a great referral for you."
—Sean Castrina