I just found out that Humble Bundle has a book bundle for Terry Pratchett’s Discworld. A 39 book bundle that is redeemed through Kobo.com.
Edit: Only available in the US.
https://www.humblebundle.com/books/terry-pratchetts-discworld-harpercollins-books
You could access the website, but I’m unclear on how the payment process works. Would canadian credit cards not be identifiable as being from Canada?
Billing address might mess that up