For English books, I usually purchase from the following online bookstores:
www.paddyfield.com - can enjoy Bookbucks discount & price are reasonable. But you better have some books/topics/ authors in mind to search. Otherwise, the classification of books by just clicking the "Children's books" icons are not so complete. delivery usually around 2 weeks
www.rainbowboat.com - user-friendly website; adding more choices in recent months. reasonable price but delivery usually takes around 1 month or even longer :cry: