You need to write an essay about hot air ballooning. you know you've seen a good book on this topic, but you can't remember the name of the book or the name of the author. how could you most easily find this book in the library?

First and foremost, you might speak with your librarian. Even if they don’t know the book in question, they will be of great assistance in helping you find it in the library stacks by narrowing down where books on the subject of hot air ballooning might be. If they can not personally assist you, you can take advantage of the library’s computer system to help you track down the book you are looking for. If that fails, you can use the library computers to do a search for books on hot air ballooning. This will give you some names and titles, which you will then be able to do a more targeted search for within the library’s own system and find the book you are looking for.

Something that was made by us humans rather than being found in nature