The Internet Archive Open Library may be what you're looking for: https://openlibrary.org/help/faq/reading https://openlibrary.org/help/faq/reading Or perhaps

The Internet Archive Open Library may be what you're looking for: https://openlibrary.org/help/faq/reading https://openlibrary.org/help/faq/reading Or perhaps the Digital Public Library of America: https://freebooks.dp.la/collection/groups https://freebooks.dp.la/collection/groups