Books to get started on Angel Investment
gyardley: The Definitive Guide to Raising Money from Angels, by Bill Payne.  http://billpayne.com/definitiveguide.htmlYes, the site looks like godawful direct marketing spam and yes, it's written for entrepreneurs looking to raise from angels.  But there's a ton of useful info in here about 'how angels work'.EDIT: There's some weird pricing tests going on on Bill's site - try this URL for the same product, potentially cheaper: http://billpayne.com/get-angel-money