What will you explore? What issue are you curious about?
Do not say, “I am going to prove that painting zebras orange should be legal.” | Rather, ask, “Is it ethical for humans to paint zebras orange?”
In other words – your presentation is exploring an ethical question, not writing a defense of an ethical position.
If the titles you are looking for are unavailable in the library, try searching for their titles through Google Books. These full-text books can help you with your research.