Sync to the furthest read page. With Amazon's Whispersync technology, you can automatically save and sync your furthest page read, bookmarks, notes, and highlights across all your devices. That means you can start reading a book on one device, and pick up where you left off on another device.
Calculate your postage rate using the international postage price calculator. For a first-class letter to Canada, the first ounce of postage costs 85 cents, a two-ounce letter costs $1.17 and a three-ounce letter costs $1.49, as of the time of publication.
1 The cost to mail a first class letter is 46 cents for up to one ounce, and each additional ounce adds 20 cents. Large envelopes (flats) that are rectangular and not too rigid or thick are 90 cents for up to one ounce (and 20 cents for each additional ounce).  Expect to pay 33 cents to mail a postcard.