The best place to search for ebooks is LibrarySearch, using the Books & More tab. If you need to log in, you'll be prompted to do so. You can search:
By title, e.g. Tourism ethics
By keyword, e.g. ebooks tourism. Including ebooks in your search means you should only get online books.
The Library currently has ebooks from sixteen suppliers and functionality varies considerably across the different platforms. It'll be clear which platform you're using once you link to the ebook. For tips on using each of them, guides or general FAQ's regarding Ebooks, please visit the Ebooks section of our website.