- English. Including versions published in India (1st edition only) and China (1st and 2nd edition) for readers in those two countries
- Chinese (1st and 2nd edition)
- Korean (2nd edition)
- Russian (1st edition)
- Macedonian (1st edition)
One thing that's clear is that we're very popular in China: fully 52% of the total has been in Chinese, and another 15% has been the English version for the Chinese market.