same here look, Kondo’s method is great for decluttering. she suggests keeping no more than 20 books and to focus on titles you’ll reuse, and reference, or keep those which “spark joy” as she says. the main problem with clutter is emotional baggage, i.e gifted books, books bought on impulse/sale, inherited books, and so on.

On Open Library (internet archive) you can borrow books for a very short period of time, i.e 1-2 hours, which is great for browsing through. Personally, I borrow books or get neat ones from the flea market, or the curb. I rarely buy books, and if I do it’s usually from second-hand or antique book stores. I prefer keeping the titles I like and revisit, I abhor the clutter that comes with owning lots of books.