I've read a bunch of sales-y books but nothing I've read in them really stuck. But: most of what you need to know about early-stage sales is embedded in _Four Steps To The Epiphany_, which is ostensibly a book about validating a market but also has a guidebook for engaging prospective customers to see if your idea is any good, which is 99.9% of the "sales" you'll do before you get traction and hire someone else to do it.
Good accompaniments for any books you read on sales are Cialdini's _Influence_ (it's also tremendously readable) and Trout & Ries _Positioning_, which will help you decide what you're selling and how to describe it.
When you're getting started, the hardest thing to learn is to ask for the sale and to not take rejection personally. Both of those ideas are as simple as they seem, and both are very difficult to learn. If you find a book that teaches that to you effectively, let us know about it.
Remember that while selling something, the person who believes in his point of view less, gets sold. So, believe in your product. Sell your customers a pain killer, solve their problems.
I hope you succeed buddy!! Enthusiasm is the key.!! (notice all the exclamation marks)