There's no contract with books. Further, most capitalist philosophers worth their salt admit that intellectual property is ridiculous: there were actual debates

There's no contract with books. Further, most capitalist philosophers worth their salt admit that intellectual property is ridiculous: there were actual debates when the copyright system got put into place, and there were actual debates when the patent system got put into place. You could choose to deny reality and call Milton Friedland a "crazypants" capitalist, or a non-real world capitalist, but you'd not only be wrong, you'd come off looking ridiculous.