Think Big and Kick Ass: In Business and in Life is a non-fiction book by Donald Trump, then head of The Trump Organization and later President of the United States, and Bill Zanker, The Learning Annex entrepreneur, first published in hardcover in 2007 by HarperCollins. Another edition was subsequently published in paperback in 2008 under the title Think Big: Make It Happen in Business and Life. Trump and Zanker had prior business ventures together before writing the book; Zanker's company helped gain Trump speaking engagements around the world with large audiences.