I do not agree with the many books and teachers that suggest there is only one way to hold a golf club. Everybody has a correct grip but it isn't found in placing your hands on the club in a "standard" position. Instead it is finding a grip that enables you to square the club face to your swing path at impact when swinging at normal speed.
The basic grip of placing the hands and fingers in a certain manner became widely accepted because it made squaring the club face to the swing path easiest for the majority of players. This is a good place to start but most players will need to experiment to find the right grip for them. Again, that is a grip that delivers the club face square to your swing path at impact with normal speed.
Start with the "Vs" formed by the thumb and forefinger of each hand pointing midway between your nose and right shoulder. If your longer shots curve to the right then your club face is open (aimed right of your swing path) at impact. To square the club face move both your hands further to the right or clockwise. If your shots curve left then your club face is closed (aimed left of your swing path) at impact. To square the club face move both your hands further to the left or counter-clockwise.
You have found the right grip when your longer shots fly straight even though you may still be pulling the ball left or pushing it right of the target. No curvature on your shots tells you the club face is square to the swing path at impact.
Don't be afraid to experiment with finding the correct grip position for your particular physical make up and swing.