In 1687, Isaac Newton published the book that explained gravity, with Edmond Halley paying for its printing; after passing through a British lord's family, a first edition sold for Rs 5.49 crore in 2026.

https://timesofindia.indiatimes.com/life-style/people/in-1687-isaac-newton-published-the-book-that-explained-gravity-with-edmond-halley-paying-for-its-printing-after-passing-through-a-british-lords-family-a-first-edition-sold-for-rs-5-49-crore-in-2026/articleshow/135116397.cms

Philosophiae Naturalis by Newton at PG (Latin and English):
https://www.gutenberg.org/ebooks/28233
https://www.gutenberg.org/ebooks/76404

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