◁ The Fortnightly Tambourine
https://calculusmadeeasy.org/?fbclid=IwZXh0bgNhZW0CMTAAYnJpZBExNDdGdldENXM1WjFoZjROVwEeYPrk5PoYAecpAdFsDkoq98N3I8Y7Buw8ACM0wJhhIMwoIUArRKXzF23nFlg_aem_izy4U9ler2pwdq8nH1b6FA https://www.gutenberg.org/files/33283/33283-pdf.pdf https://archive.org/details/calculus_made_easy_1608_librivox
Calculus Made Easy
Silvanus P. Thompson's classic 1910 textbook that teaches the fundamentals of calculus in a simple, non-technical manner. Freely available in multiple places (Public Domain).
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