Question: Transporting Books across US-Canada Border

We have had a number of Canadian clients obtain print on demand books through us. I'm not aware of any issues with customs, in terms of additional fees, see below (and feel free to contact me for a quote on shipping to your address--even if we have to make up some book specs to get the quote for you). I don't recall any customers mentioning that they found the shipping fees unexpected or exorbitant, and several Canadian customers have requested multiple shipments over the course of time. The books shipped via Canada Ground. Here are some details:

--Quoted freight rates include import duties, taxes, brokerage fees, custom fees and document preparation
fees. These fees will be included on the invoice to the customer.
--Delivery to most addresses in the 10 provinces of Canada within 3 to 7 business days of shipment date,
based on the location of the Ship To address.
--Shipments are trackable
--P.O. Boxes cannot be used as a Ship To Address