I really feel sad for younger people. I was raised with books, written entirely by human minds where any nonsense would have been simply human error but it was rare because books have editors.
I still have a great many books some of which I had as a child, I treasure them, here's one of them from 1965.

He also wrote the superb Teach Yourself Further Calculus.
I still have a great many books some of which I had as a child, I treasure them, here's one of them from 1965.

He also wrote the superb Teach Yourself Further Calculus.
