You can link to a whole book, a page in a work, or a public collection from your web pages, social media sites, or Canvas course site. From the book reader or full view of a work, look at the bottom left corner for the "Share" option. Expanding that option will give you two links: copy the "Permanent link to this item" if you want to link to the complete work, or copy the "Link to this page" if you'd like to point to a specific page.
You can also embed a book within your web pages. See instructions at https://www.hathitrust.org/embed.
Some additional sources of guidance, from HathiTrust: