Today, following a book reference by someone in a discussion thread, I ended up purposefully using the Internet Archive’s book collection for the first time. The book in question was a 1965 UK paperback. The Internet Archive offer several million books from around the world, and my Startpage search for the book led me to their collection. Being logged in with my account (I’m a monthly supporter of the Internet Archive, maybe you want to consider that too), I could hit the ‘borrow’ button and have the scanned and indexed 1965 book before me for an hour. Going through the table of content I quickly found the two things of interest to me, skipped to the two related chapters, read the relevant few pages, and hit the ‘return this book’ button after 10 minutes.
That was very useful. Following up a loose thread of information, finding the source, lift out the few relevant details, make a note of it, connect it to a few existing notes and move on. Useful and a very pleasing process.