The library catalog contains records for where to find all of the materials we physically own in the library: books, movies, board games, etc. It also contains links to all the e-books and streaming documentaries we own. We share this catalog with libraries around the world which allows us to get print items we don't own from other libraries, but this doesn't apply to e-books.
Using search terms like aeronautics instead of aviation may help.
You can limit your searches to e-books which are likely to be the newest information and most up-to-date.