no that was Calculus for the practical man

http://www.goodreads.com/book/show/7398477-calculus-for-the-...

Feynman had read both books. He mentioned the prefatory quote from 'Calculus Made Easy' in an interview given to Omni Magazine in 1979:

"... I had a calculus book once that said, 'What one fool can do, another can'..."

I have this in Chapter 9: 'The Smartest Man in the World' in Feynman's book 'The Pleasure of Finding Things Out'.

Thanks for the correction, I didn't know that

I thought the book Feynman mentioned was Woods: Advanced Calculus: https://www.reddit.com/r/math/comments/17dq5l/is_there_a_mod...

IIRC, Feynman mentioned Woods in the context of differentiation under the integral sign, whereas J.E. Thompson was in the context of learning Calculus as a kid.