I learned from the original edition back in the 80's. When I saw the price at Amazon I was surprised. The list price is given as $67. The Amazon price is $48. T

I learned from the original edition back in the 80's. When I saw the price at Amazon I was surprised. The list price is given as $67. The Amazon price is $48. The book's a classic but the pricing seems excessive given that the edition is 22 years old.