Peter Cowley, a Cambridge university technology graduate, founded and ran a dozen businesses in technology and property over the last 35+ years. He has a portfolio of over 65 angel investments with 4 good exits and several failures, and was UK Angel of the Year in 2014. He is chair of the Cambridge Angels and President of the European Business Angel Network. He has mentored hundreds of entrepreneurs and is on the board of eight startups. He formed and runs Martlet - a Corporate Angel, investing (currently GBP7M) from the balance sheet of Marshall, a GBP2.5bn revenue Cambridge engineering company. He is a fellow in Entrepreneurship at the Judge Management School in Cambridge and has been a chair and treasurer of seven charities. With his son, Alan, Peter is sharing his and others' experience and anecdotes in order to educate angels and entrepreneurs by publishing The Invested Investor.