During the past 25 years David Mammano has started seven businesses from scratch and now use those experiences to help others with their entrepreneurial dreams.
He’s a three-time Inc. Magazine 5000 Growth Company winner, a TEDx speaker, an adjunct professor at the University of Rochester, and the author of business and college planning books.
His most recent book “Crash and Learn: Lessons in Business” quickly rose to the top of the Amazon best seller lists. 
Links:
https://www.davidmammano.com
https://www.davidmammano.com/book