Clark Wayne
Superstar
Robinhood if you're a beginner and starting out small. Don't recommend it for day traders. You also can't short stocks or do options on it yet either.What's an app I can use to get started? Any recommendations on stocks buying and selling books?
For more advanced brokers you could try E-Trade or Scottrade.
As for books, there were some recommend in this thread but I forgot. Honestly though all the info you need is on the Internet. Investopedia is a great site for understanding the basics. Also check out Reddits investing forum.