Investing cannot be taught in a day. But with the right teaching developing an introductory understanding to the do's & do not of investng may be quicker than you think.
Some best books that you should read atleast one before get entry in the security market.
(1) "THE INTELLIGENT INVESTOR" by Benjamin Graham
According to Warren Buffett thinks this is the greatest book on investing ever written.
Benjamin Graham is a wall street lengend who first published this book in the year 1949 and his last update of this text in the 1973.
(2) "A RANDOM WALK DOWN WALL STREET: THE TIME-TESTED STRATEGY FOR SUCCESSFUL INVESTING" by Burton Malkiel
This book was written by economist and priceton professor in 1973. This book already update nearly dozen of times.
(3) "THE FOUR PILLARS OF INVESTING: LESSONS FOR BUILDING A WINNING PORTFOILIO" by William Bernstein
The writter is more than just a Neurologist. He is also a savvy investor & insightful financial thinker, and he brings these skills to The four pillars of investing to create a through initial education for those curious ablout the world of the investing.