Recommended Reading: "Angel: How to Invest in Technology Startups" by Jason Calacanis
If you are seeking investment this is worth a read (or listen as it is available on Audible). In the book Jason (who has had a couple of spectacular successes) describes what it takes to be an Angel Investor and, most importantly for companies seeking investment, what he and other investors typically look for in a business.
There are numerous stories on his experiences.
The book also addresses a subject dear to my own heart, Monthly Summaries and how they are vital to keeping investors aligned and on board.
Jason has given a number of interviews including in September 2017 a 'Talk With Google' which can be found on YouTube.