Gompers, Paul and Lerner, Josh, The Venture Capital Cycle, Cambridge, MA, MIT Press, 1999

Hill, Brian E. and Power, Dee, Attracting Capital From Angels: How Their Money and Their Experience Can Help You Build a Successful Company, New York, John Wiley & Sons, 2002

Moore, Karl and Coveney, Patrick, Business Angels: Securing Start Up Finance, New York: John Wiley & Sons, 1998

Osnabrugge, Mark Van and Robinson, Robert J., Angel Investing: Matching Start-up Funds with Start-up Companies – The Guide for Entrepreneurs, Individual Investors, and Venture Capitalists, San Francisco: Jossey-Bass, 2000.

Simmons, Cal and May, John, Every Business Needs an Angel: Getting the Money You Need to Make Your Company Grow, Washington DC: Crown Business, 2001.