I have added detailed order and shipping information to my website (link at the bottom of any page), along with some changes to my prices and now offering flat US shipping costs. This is to help with up-front pricing so you don't have to wait for check out to find out the shipping cost.
I averaged the shipping costs and slightly decreased the book prices. Customers in the Pacific Northwest will see approximately $0.50-$2.50 in total savings and customers elsewhere in the US will save up to $6 compared to previous costs. International Customers will still be subject to shipping prices based on options chosen during check out.
I have also introduced a new automatic discount: if you buy 1 Butterflies of the Sinlahekin Wildlife Area (either version: full price or "gray cover" reduced price) and 1 Pocket Guide (3rd edition only), you will get 20% off the Pocket Guide. The discount will appear in your cart.