I've become an affiliate for The Book Depository, where you can buy books with free shipping to almost all around the world. It's really is free shipping! I've tried it so many times before ^^ And although the price of the book itself is slightly higher than, say amazon, other sites will still charge you with shipping fee, making the total payment is substantially higher than the price listed on The Book Depository. So, what are you waiting for? Go shop at The Book Depository!
PS: click here for you to check where in the world does TBD sends books for free ^^