“No two persons ever read the same book.” - Edmund Wilson
Pretty much, all you would have to do is pay the shipping cost to exchange books (using USPS reduced pricing for "media mail"). But unlike the library, there will be no "late fees" because you can set the duration of the exchange with whomever you trade books with.
You'll get an opportunity to share books that you love and you'll gets suggestions from others about books that you may have never heard of.
Most importantly, doe, you'll be READING. And like the late Mark Twain once said, "The man who does not read good books has no advantage over the man who cannot read them." Check out the The Book Swap link above (located beneath the header). Peace!