Calculus for Beginners and Artists (2003)
Robert Ghrist has written an colorful and innovative calculus text.<p><a href="https://www.math.upenn.edu/~ghrist/calculus.html" rel="nofollow">https://www.math.upenn.edu/~ghrist/calculus.html</a><p><a href="https://www.math.upenn.edu/~ghrist/notes.html" rel="nofollow">https://www.math.upenn.edu/~ghrist/notes.html</a><p><a href="https://sites.math.washington.edu/~morrow/334_13/FLCT.pdf" rel="nofollow">https://sites.math.washington.edu/~morrow/334_13/FLCT.pdf</a>