This was one of the books Feynman used to learn Calculus.
The other was Advanced Calculus by Woods:
The other was Advanced Calculus by Woods:
https://news.ycombinator.com/item?id=14192894
that indicates the text Feynman first used was Calculus for the Practical Man by J. E. Thompson. Both are quality texts and as the linked HN thread notes, can be found on archive.org.