Also, I should mention that some books might be under creative commons licenses, but that's rare. Alternatively, some authors self-publish and might offer free downloads. I should ask the user to check the author's official site for such options. Maybe also warn that searching for "free PDF Emil Strainu" might bring up pirated copies, so caution is needed.
Additionally, I can suggest alternatives, like purchasing physical copies or using e-book platforms with free options. It's also good to encourage supporting authors by purchasing their books if possible. I need to make sure the tone is informative and helpful, not just list sources but also explain why certain methods are better than others.
Finally, check for any typos or inaccuracies and ensure that the advice is both practical and lawful. Maybe add a note encouraging readers to respect authors' rights while still seeking affordable or free access through proper channels.