You should be able to renew your ILLiad book by logging in to ILLiad (https://www.iup.edu/library/interlibrary-loan/) and then viewing your outstanding requests. Select the item you want to renew and then click the "Renew" link. That link will only be there, though, if the item is eligible for renewal. If you don't have the option for renewal, the item is not close enough to the due date to renew, overdue, or previously renewed the maximum number of time.
PALCI books are loaned to us with no renewals. You will need to return these books by their due date.
If have you questions or need help with your ILLiad or PALCI loans contact Beth Farabaugh at farabaug@iup.edu.