Student: Excuse me, do you have any books on renewable energy?Librarian: Yes, we do! We have quite a collection. Are you looking for something specific?Student: Well, I'm writing a research paper on solar energy. Do you have anything recent?Librarian: Let me check our database. Ah, here we go. We have "Solar Power: The Future of Energy" published in 2022. It's an excellent resource. We also have "Renewable Energy Solutions" from 2021.Student: Great! Are both available right now?Librarian: "Solar