As far as I can tell all of your questions have been answered.
You signed up for the bonus for Titian on 2008-06-25, completed it on the 2008-07-21, and selected your books on 2008-07-23.
On August 21 you asked about delivery and we sent the tracking number with instructions on how to look it up at
www.usps.com. It doesn't seem as if you checked the tracking information because it shows that: "USPS attempted to deliver your item in AUSTRALIA at 12:29 PM on August 1, 2008."
Note that the tracking number for your shipment can be found on our bonus program site by clicking the "review" button next to the program you are interested in. It is not necessary to ask us for this information.
Please check with your local postal authorities, hopefully they haven't sent your books back.