For rewards #2, #3, and #4, please add $10 for Canada, $15 for Mexico and $20 for all other locations. These costs should be added to the pledge amount. (i.e. if you would like to pledge for the $50 reward, you should type in $60 instead to have it be shipped to Canada) These international shipments will go out through USPS First-Class Mail.
For rewards #5 and #6, please leave a comment with your address, and I can tell you exactly how much to add to the pledge. You do not need to add additional shipping costs for books when you choose rewards #5 or #6.