To create a persistent link to a book, go to the book's
Detail Page, then click
(to the left below the cover image).
To create a persistent link to a particular chapter or page in a book, use Read Online and navigate to the desired page, then click “Share Link” (in the icon bar at the top).
Once you click
"Share Link", the link is displayed and you can copy it:
Note,
if you are using a proxied link, the
URL generated will also be a proxied link.