After the Holy Quran,I think it's an Urdu novel " Jannat k pattay" the leaves of heaven.

I'm not really sure whats popular now but I know the Harry Potter books are always being read.

There is only one English version of the book popular in China named "《 The Ugly Japanese 》" with ASIN: B01K6FODFG. I do not know if you have any interest in that.