Can somebody suggest me a good book on Financial Planning & Taxes?

I am an insurance agent and mutual fund distributor. I am a science graduate, and hence know least about concepts of commerce.

I am looking for a book which can help me offer better financial planning to my clients. The books should explain the concepts of various investment instruments like Mutual Funds, Stocks, Real Estate etc. It will be great if the books contains chapters on Taxes (and its various sections). In a nutshell, a book for dummies on Financial planning and Taxes.

Please suggest. Thanks a ton.