You'll need to know your code to invite other people to a library.
Finding your library code
Once you've created a library, you can invite others to it by clicking the Libraries button in the top toolbar.
Find the library you've created and click the 3 dot menu to open the settings. Then choose Invite.
You'll be given a code which is the code students will use. They will need to enter this code when prompted directly after they have first signed in.
Once you've generated a code for a library, you'll see it above the books on your bookshelf any time you're in that library.
If you need to expire the code or manage the students that have joined, see Managing your library.