There are a couple different options:
If you just want to share the link in one or two other people for approval you can click on MANAGE LADDER > PREVIEW BOOK > Then copy the link from below the flip book.
Another option, is to have your students have access to the e-yearbook with a code they will receive when they purchase a physical book in our online store. You can set this up in MANAGE YEARBOOK SALES > SETUP ONLINE SALES