'The Book OF Hard Knocks' I don't think you will ever find a book about real estate investing that is not 99.89% B.S..

I want to barf when I read books about real estate investing.  I was recently looking at one of Robert Kiyosaki's books (not Rich Dad, Poor Dad) and the book has some fairly good teachings (not about wholesaling). Can't remember the name of the book, but it is (was) currently on sale at a book store.

@Lucas Ritter Great question! I just was speaking with an elderly real estate agent who had not even heard of wholesaling real estate. He was an instructor for a class geared toward studying to pass the state exam (Not investing). He told me that its not legal to make cold calls as an agent in California. He admitted to not knowing everything (and I started questioning his answers). I love soaking up knowledge anywhere I have the opportunity. The bigger pockets community is great for that. Although some people are more helpful than others. 

A question I had was "do you need a realtors licence to do wholesaling in California?".  

Here are a few books I'd recommend:

• If You Can't Wholesale After This: I've Got Nothing For You...by Todd Fleming
• Wholesaling Bank Owned Properties: Learn How to Wholesale and Flip Houses by Lex Levinrad
• The Book on Investing In Real Estate with No (and Low) Money Down: Real Life Strategies for Investing in Real Estate Using Other People's Money by Brandon Turner

@Lucas Ritter

Hello Lucas,

"You're Only One Deal Away" by Edward Hayes

Is a great guide.

@Jay Hinrichs  should be able to answer your question. I believe CA has enacted tougher laws on unlicensed brokering.

@Lucas Ritter - I would recommend books on marketing and sales if you want to learn about wholesaling.