They were due back on May 7th but there is a 15 day grace period to help students to get their books back to the Campus Store. They will need to be shipped back to the Campus Store. You should have received an email with a FREE shipping label and packing list. If you did not then please contact the Campus Store via phone (713 743 7095) or email (campusstore@uh.edu). Students will continue to receive email reminders until the Campus Store checks the book in manually. Timeframe: shipping time, quarantine time, and processing time.