I assume you mean how do you renew books that are checked out to *you*? You can call the Circulation Desk at 474-6762 and give your Polar Express number on the back of your card, (the one starting with 2000...) and get your PIN. Then:

-click on "Goldmine" from the library home page, (library.uaf.edu) and
-click "my account" from the upper right hand Goldmine screen.
-Your "user ID" is the 2000 # on the back of your Polar Express card.
-Your password is your PIN.
You may renew your books this way, check your record, change your record, and change your PIN.

Please note: if your items are overdue, you will not be allowed the renew them. You will have to call the Circulation Desk. Instructions for this process are at http://library.uaf.edu/pin and and other services available to you are at http://library.uaf.edu/circulation.