You are correct that no such permission is required to use, lend, or resell a book. It would be unethical for a seller to impose a requirement for such permission. By the poster’s analogy, it is similarly unethical to impose a requirement for permission prior to the owner’s use, lend, or resale of a computer. Since Google sells computers that cannot later be used without Google’s permission, Google is imposing such an unethical requirement.