What book influenced you the most as a financial advisor?
It's hard to pinpoint only one. So here are a few:
Simple Wealth, Inevitable Wealth - Nick Murray
The Excellent Investment Advisor - Nick Murray
Behavioral Investment Counseling - Nick Murray
(Basically anything by Nick Murray)
The Million Dollar Financial Services Practice - David Mullen
I would recommend Simple Wealth, Inevitable Wealth by Nick Murray and The Investment Answer by Daniel C. Goldie and Gordon S. Murray. These two books will give you a good working knowledge to make sound investment decisions throughout your life. Plus they are easy reads and don't over complicate the issue.
"Security Analysis" is a classic and a pretty heavy read. I will give you two others to think about. "Against the Gods" by Peter Bernstein explores the risk side of the equation and "Your Money, Your Brain" by Jason Zweig is a must read for anyone interested in behavioral biases.
I hope that helps and happy reading.
Some of Benjamin Graham's books are renownly known as the greatest fundamental investment books ever written, but for a non-advisor, they may become a little too technical. If this is not the case, and Security Analysis was a good read for you, check out his best selling book "The Intelligent Investor". However, I believe John Bogle's book "Common Sense on Mutual Funds" may be a much more benefical read for you, as it focuses on passive investing instead of stock picking. Without knowing what type of trader you are, these are the most general recommendation I can give.
David Michael Howard
For the investment aspect of being a financial advisor I would recommend 'Fooled by randomness' by Nassim Taleb. For the business of financial planning ie how to help clients and grow your business: 'The excellent investment advisor' by Nick Murray is a good one.