answered about 14 months ago by Mike

From my experience, books I have ordered through Amazon etc. are not delivered through regular post, but usually USPS, Fedex, DHL etc (online vendors I have used provide a choice, of course costs are different for different delivery services).
Regarding difficulties in the deliveries of postal items, I have a particularly difficult address, so simply found out where our mail was delivered from and paid them a visit to introduce myself. These posties are an efficient and friendly lot, and after that absolutely no problems.